"What was the fruit like? Unfortunately, no one can describe a taste. All I can say is that, compared with those fruits, the freshest grapefruit you've ever eaten was dull, and the juiciest orange was dry, and the most melting pear was hard and woody, and the sweetest wild strawberry was sour. And there were no seeds or stones, and no wasps. If you had once eaten that fruit, all the nicest things in this world would taste like medicines after it. But I can't describe it. You can't find out what it is like unless you can get to that country and taste it for yourself."
A Snapple ad, where the people of the company are all talking about the "stuff" in their new drink. Their only description of ingredients is green and black tea.
One A1 steak sauce ad has a cooker who thinks the sauce tastes so delicious, he can't resist licking a drop that fell on an open barbeque.
A notable McDonald's commercial has a singer singing all about how he knows his girlfriend's secret and shows her sneaking around in the rain only to reveal that he knows she doesn't share her ten -piece Chicken Nuggets.
A notable Avocado ad gives us these lyrics:
So soft and green and Ripe-Uh!
I'm gonna lay you down....
On a bed of Greens tonight."
(Oh Avocado so green, Best fruit I've ever seen)
Anime and Manga
Howalon in Gakuen Alice is a candy said to be somewhere between marshmallow and cotton candy, only twice as fluffy and delicious.
A common occurrence in Yakitate!! Japan. One of Azuma's breads is so good that anyone who eats it briefly dies and goes to Heaven.
Yumeiro Pâtissičre: This happens a lot when they try different sweets. One example is a cheesecake that made them see a choir of Cows mooing Ode to Joy.
One food item in particular was so delicious that it seemed to grant enlightenment in whoever ate it. Giving it to the world leaders was what stopped an entire world war. They named the ingredient "GOD".
Played with in Kyouran Kazoku Nikki. The son of an assassin turned his back on his father's trade and set up a Chinese restaurant based on his mother's recipes. People who eat his food tend to fall into comas. His father taunts him that he's a killer through and through. The real reason is that the food is so delicious it overwhelms an average human's senses.
Anpanman himself is an impossibly delicious food. A chunk of his anpan head wins people over, makes crying children happy, and automatically stops growling stomachs.
A short story by Junji Ito named Splatter Film tells of a kind of honey that tastes so good that everything else completely pales in comparison once you've tried it. In fact, the main characters who get to try it start to suffer from starvation as nothing else tastes good anymore. It doesn't help that there's a certain risk in eating said honey...
By the same man, Uzumaki has a chapter where a hospital begins serving incredibly delicious mushrooms as a staple of their meals. The protagonist is suspicious of the food and never eats it, but everyone else can't get enough. It turns out the mushrooms are actually the re-grown placentas and umbilical cords of several newborn Enfant Terrible who wanted to be put back in the womb. At the end of the story, the mushrooms turn out to be so delicious that the hospital staff just gorge themselves on them and pay no mind to the creepy, naked, pregnant mosquito-woman drinking their blood.
Milk from Miltank in Pokémon is like this, as Ash and his entourage quickly find out after Whitney - who raises Miltank on her family's farm - offers it to them; Whitney actually sells it, along with milk-based products made from it like cheese, butter, and ice cream.
InSword Art Online, Asuna creates the most delicious stew with a ragout rabbit, a super rare S-class ingredient that Kirito found out of sheer luck.
In Silver Spoon: This is always Hachiken's reaction to eating food from his agricultural school and various family farms. As a City Mouse, it's the first time he has eaten food fresh from a farm. When they make pizza on campus, it's too delicious to describe in words, so everyone bursts out laughing.
In Log Horizon, Shiroe's party pretty much viewed Nyanta's food as this, after subsisting in a diet of food which uniformly taste of unseasoned rice crackers for a couple of weeks.
Umpty Candy in Judge Dredd is like this. It's so delicious that Justice Department had to ban it an exile the creator from Earth to maintain order, and in the modern series, there are major criminal operations devoted to smuggling and dealing it.
In The Heir to Prince Manor Harry developed a craving for merlinnas, an incredibly delicious faery fruit - but only if you picked it at dawn; any other time and it would be hard and bitter.
In Hoodwinked, the villain, who is revealed to be Boingo creates a substance to lace the sweets in that will make them delicious to the point of addiction. He completes his explanation of the Evil Plan with an illustration of a skinny child before a plate of cookies The picture changes with each side, ultimately becoming a morbidly obese child with chocolate all over his face.
Films — Live-Action
The fruit in Pans Labyrinth looked delicious... considering Ofelia had been denied supper the night before (and rationed since long before that), you could almost forgive her for being totally Genre Blind...
God of Cookery has two dishes that qualify: Pissing Beef Balls and Sorrowful Rice. Both cause people to drift off into their imaginations while writhing about. (For those wondering, the former is a meat ball with juicy shrimp inside that squirts when bit into. The latter is just a well-made BBQ pork rice bowl.)
Sorrowful rice makes the judge burst into tears, as she knows that there will soon come a time when she -won't- be tasting this food in her mouth and the thought horrifies her. Or maybe it was the onion.
The fruit in "Goblin Market" by Christina Rossetti. Unfortunately it's also a metaphor for drugs. Or sex. Or... something. (Maybe temptation itself.) Once Laura eats some she loses the will to eat anything else, it's that delicious — but from that day on the goblin sellers of the fruit are invisible to her.
The Queen's Museum and Other Fanciful Tales by Frank Stockton: The story "Christmas Before Last" has the Fruit of the Fragile Palm. It's similar to a coconut, but the inside is so delicious that it's worth as much as diamonds or pearls.
One Homer Price story is about "Ever-So-Much-More-So", an invisible powder which makes anything moreso of what it is. It's introduced as a thing you put on food to make it better, but it also "works" on other things — for example, if an ornery person eats things with it sprinkled on, it makes that person Ever-So-Much-More ornery.
Bertie: Good old Anatole, God's gift to the gastric juices. Many's the time that I have regretted I have but one stomach with which to enjoy his offerings.
Food from the titular Abbey in the Redwall series is normally described in such a manner as to make your mouth water. Eventually, a cookbook was printed, so now you can make your very own turnip'n'tater'n'beetroot pie! Redwall isn't everyone's taste in literature, but any writer who can make children want to eat food made mostly of vegetables has to be doing something right.
Aside from the page quote, C.S. Lewis used this trope in Perelandra with not one, but TWO Venusian fruits.
The bizarre short story "Biscuits of Glory," collected in one of Bruce Coville's anthologies of children's stories, features biscuits that are "heavenly" in a near-literal sense. In a normal person, this causes levitation. When given to a ghost, it "feels like it went to heaven," and is exorcised. Of note is that this is ultimately a negative effect, because nothing else can compare to the taste of the biscuits.
Mentioned briefly in A Wrinkle in Time. When Meg is recuperating from her brush with IT among Aunt Beast's people, the food that Aunt Beast gives her is described as "incredibly delicious" — just one more way in which aliens are superior to humans.
A softer version of the trope is played with earlier; Meg, Calvin, and Charles Wallace are offered a meal on Camazotz by the Man with Red Eyes. Meg and Calvin happily enjoy their delicious meal, while Charles Wallace complains that all he can taste is sand. It turns out it's a form of mind control. Since the Man with Red Eyes can get past Meg and Calvin's mental defenses, he is able to convince them the meal is good. Since Charles Wallace unknowingly puts up more resistance to the control, he cannot be convinced.
In the Discworld novel Thief of Time, newly incarnate entities known as the Auditors are exposed to chocolate for the first time; the experience is so overpowering that it physically kills them. Though this is sort of an inversion; the chocolate is ordinary chocolate. The Auditors designed their bodies under the assumption that more sensitive taste buds would allow them greater analytic accuracy, but meant they could not handle strong tastes such as from chocolate.
A major plot point in one of Bone Chiller's novels (a series of children's horror fiction novels similar to Goosebumps). A new lunch lady makes food so delicious that all the students and teachers flock to the cafeteria every day to get a taste of her meals, and even fighting over them. It's so good that the main character cannot bear to eat anything other than her cooking, comparing his cornflakes he ate for breakfast to sawdust. However, over a series of strange events the he realizes that the lunch lady is actually a giant insect who implants eggs in her cooking so that they will incubate in the hapless residents, controlling their movements until they eventually hatch and discard their hosts' bodies. The main character manages to bring the bug lady down with the help of a fellow student (who was allergic to outside food and had to bring her own lunch to school).
The Wind Singer had the underground mud people eating some kind of smoky, sweet roasted nut/fruit that Bowman and Kestrel found tastier than anything they'd had in their whole lives.
The obscure Tesco Children's book Guzzle is about two children who invent the world's greatest soft drink, to the point where nobody can stop drinking it. It gets to the point where even health experts won't reveal how healthy it is because they're too busy drinking the stuff.
Occurs in Orson Scott Card's Treasure Box - the weird rich people eat food that appears to be the platonic ideal of food, the best food you could possibly imagine, every bite perfection. Turns out that's because you ARE imagining it.
In his short story collection Fragile Things, Neil Gaiman included a story called "Sunbird", about the ultimate food sought out by a club whose members make a habit of eating the rarest, most difficult to get foods. The members of the club, aside from the cook (who "practiced" from foreknowledge in preparation) get burned up from eating it.
In Doorways in the Sand by Roger Zelazny, mirror-reversed bourbon is described this way. The protagonist spends most of the book mirror-reversed, so he can appreciate ordinary bourbon like this; at the end of the book, when he gets flipped back to normal, he thinks that while he won't miss much about being reversed, the bourbon will probably haunt him for the rest of his life.
In Robin Hobb's The Soldier Son trilogy, Everything Nevare eats becomes this once the Speck magic starts to get under his skin.
The native family Flinx encounters in Mid-Flinx were out gathering fruits called sugararries when they got lost. When he shares his supplies with them, Dwell reluctantly admits that chocolate is almost as good as those fruits.
The wine which the angel Islington serves to Richard and Door in Neverwhere is described in terms of this trope.
Pity that it causes a horrible hangover afterwards. Possibly a hint that Islington isn't as nice as he seems.
In Spider Robinson's Mirror Mirror, Off the Wall Robert Trebor gives Callahan a case of liqueur in exchange for a case of rotgut. Jake Stonebender called Trebor's drink "The Wonderbooze", saying that "it felt to the mouth, I imagine, the way a velvet pillow must feel to the cheek. And it kicked like a Rockette. It ennobled the mouth." Trebor, it turns out, is from a mirror universe with a reversed metabolism; what tastes terrible to us would taste wonderful to him and vice versa.
L.E. Modesitt's Imager Portfolio spends an inordinate amount of time talking about food. Sure it's supposed to take place in a alternate fantasy version of France, but even then, there is a lot of talk about the food and how amazing nearly all of it is.
In Charlie and the Chocolate Factory, Willy Wonka's confections are so tasty and wildly imaginative that rival candymakers sent spies into his factory to steal the recipes for them. He responded by closing it down, and when it finally was up and running again, no one could figure out how it was possible — no workers were ever seen going in or out and Wonka himself was now a Reclusive Artist. Thus, when the news breaks that a contest to win a trip into the factory has been launched, it becomes an international obsession. The 2013 stage musical adaptation gives much of the expository song "The Amazing Fantastical History of Mr. Willy Wonka" over to discussion of just what Serious Business his treats were even before he became a recluse:
From all around the world they called on Mr. Wonka
Kings and queens and presidents
Even down in Rome the Pope left home
And in the fact'ry took up residence
Dalai Lamas and their mamas
Had such episodes and dramas!
Even Gandhi got himself into a brawl
In Star Trek: New Frontier the Beings (true to their Greek god heritage; see below) have the legendary ambrosia. It looks like a golden jelly-like pudding, but whoever eats it almost instantly begins to worship the Beings. This sensation happened to the Danteri...and Soleta, probably the most logical person on the Excalibur.
Live Action TV
In the Doctor Who episode "The Happiness Patrol", the Kandy Man describes his favoured method of execution: he creates "sweets that are so good, so delicious that sometimes, if I'm on form, the human physiology is not equipped to bear the pleasure".
In the TV version of The Hitchhikers Guide To The Galaxy, Ford discovers some hagra biscuits baked by the Dentrassi and tells Arthur, "Your mouth will love you for the rest of your life." Unfortunately, the Dentrassi baked these particular biscuits for the Vogons; after one mouthful, Ford realises just how much Dentrassi hate Vogons.
The Soup Nazi's soup in Seinfeld. It's so good it makes your knees weak.
Fraggle Rock had the Grapes of Generosity, which are so delicious that anyone who finds them will not want to share them.
it also has the Mossmelon, and the Legendary Tooth (doozer) Tower, which were used to snap Wembly out of his stubbornness.
Stargate SG-1 has kassa, an addictive form of corn distributed by a group of bad guys as a means to control various planets. One SGC team member takes a bite out of curiosity and describes it as "sweet corn heaven."
The coconut cream pie from the iCarly episode "iPie". Sam says she wants to marry the pie and Carly apparently wants to do the pie equivalent of motorboating...
Kold Kream ice cream in the episode "Catching Cold" of R.L. Stine's The Haunting Hour is this. It's comes with a pretty deadly price to get a good supply of it though...
The best burger in New York on How I Met Your Mother. There were other burgers that produced this sort of reaction in the group, except Marshall, who had previously tasted it; but when they finally found it, their reactions were the strongest. Double Subverted when Regis Philbin claimed after all of that the burger was still not the right one, and then after a moment of thought, realized that it was.
The Golden Girls'' plays with this on occasion, but the dish that stands out is Rose's Sparhuven Krispies. They smell downright foul, but if you eat them right, they taste just like cheesecake, fresh strawberries, and chocolate ice-cream.
Iron Chef: The whole reason Chairman Kaga set up Kitchen Stadium.
Competitive cooking shows by nature frequently challenge contestants to create tasty foods with unlikely combinations of ingredients. The results either end up here... or there.
Supreme Chef Reese's food is supposed to be like this on Malcolm in the Middle. In an episode where he pulls out all the stops to make a magnum opus Thanksgiving dinner, he's able to coerce his father and little brother into working like slaves and putting up with his Prima Donna Director tendencies just by periodically giving them a taste of whatever he's currently working on and watching them melt.
One episode of QI discussed how it took over three hundred years from its discovery for a specimen of the Giant Tortoise to be presented to the British Museum, simply because people kept eating them before the ship could reach its destination. Contemporary reports describe it as being unbelievably delicious, which the guests naturally took Up to Eleven ("right, this time we'll take nine of them, and we'll eat eight"). Unfortunately, they're a protected species now...
Also mentioned is the historical example of Stellar's Sea Cow, which is extinct because of how tasty it was.
In Law & Order: Criminal Intent, the daughter of a chef claimed that her father could cook up a 4 Star meal with a hot plate and left overs.
The addictive wursts sold by SKUL in the MI High episode "Fit to Wurst".
Mythology and Religion
In the ancient Greek The Odyssey, the food of the famous Lotus Eaters is so good, whoever eats it never wants to do anything else but sit there one the island and eat and eat forever.
See also: ambrosia, nectar of the Greek gods. (Or in other mythologies, booze of the gods, honey of the gods, milk of the gods, elixir of life, etc...)
Essential Food from GURPS: Magic is basically food in its purest, most perfect form. (It's created by magic, of course.)
Preparing such foods is a special ability of Lilim of Gluttony in In Nomine.
The results of a Heroes' Feast spell in Dungeons & Dragons or Pathfinder. Not only is it incredibly delicious (as opposed to the bland but nutritious stuff produced by Create Food and Water), eating it can cure any poison or disease, and for the next twelve hours the diners gain several buffs. Once your party gains access to this spell, expect it to become their primary source of food.
The Complete Book of Elves in the 2nd Edition of Dungeons & Dragons mentions feywine, a potent wine made by elves that usually only their royalty drink; even elves find it hard to resist after tasting it, and humans have been known to fight over it when the elves share it with them (which is rare, for that exact reason).
Ultimate Curry/Finest Curry in the Harvest Moon games, which nearly everyone loves and will do almost anything to taste. A large number of bachelor(ettes) even have one of the two as their favorite item! However, Carter and Alisa both despise the stuff.
Planescape: Torment has a series of short stories in the form of memories. One tells the story of a wine connoisseur who is offered a wine so delectable that he is willing to literally do anything to get another taste.
In Earthbound, the Delisauce condiment. Nobody knows what it tastes like, but it makes everything incredibly delicious (thereby maximizing its recovery effects).
The sunny side up dragon egg in Disgaea 3, which prompts Mao to give a lengthy speech about how good it is.
The Golden Apple in Super Paper Mario, which causes so much contentment that whoever eats it sleeps peacefully for a very long time.
In The Sims 3, an expert chef Sim can prepare Ambrosia. It takes two rare ingredients, but it's so potent that the consumer gains a powerful, positive moodlet for A WEEK. It also brings Sims back from the dead - ghosts can interact with it.
In The Sims 2's Free Time expansion, sims with the Family aspiration can learn to prepare Grandma's Comfort Soup. It gives a strong boost to food and comfort meters, and automatically cures sicknesses (which normally would need to be waited out or treated with the medicine station from the Science career).
The Black Emporium of Dragon Age II has a barrel containing "The Pickled Apples of Arlathan." In its codex entry, Brother Genitivi describes a taste of a sliver of one of those apples as the epitome of what an apple tastes like. The five sovereigns he paid for that taste, he says, were well spent.
Chansey eggs in Pokémon are said to be this, in addition to being delicious, it's healthy. It's evolution Blissey takes this a step further: even one bite will cause the most sour sourpuss to become unfailingly caring and pleasant to everyone.
Moomoo Milk, which is given by Miltank, is similar, but easier to get. Although, most Poké Dex entries for Miltank focus more on its milk's incredible nutritional value, rather than its taste, which acts as a healing potion for Pokémon.
Oko San's route in Hatoful Boyfriend culminates with him and the heroine leaving school on a quest to find the mythical True Pudding, a seven-colored dessert so perfect that one bite will grant the consumer eternal happiness. In his extended ending in the paid version, eating it grants Oko San godhood.
Oddworld: Abe's Exoddus gives us Soul Storm Brew, a drink so addictive that the Glukkons are able to make willing slaves out of the Mudokons by giving out 'free samples'. Once the Mudokons were hooked, the Glukkons told them that to get more they would have to work for them.
In the first Ys game, the Roda tree seed is said to be this. Somebody in a bar asks you to get one, but once you do he changes his mind because the seeds have become hard to find and he's afraid if he eats it nothing else he eats will ever be as good. You can eat it yourself, which is part of the requirements to be able to talk to the Roda trees and get the Silver Sword.
In Dwarf Fortress, let a dwarf do enough cooking and he'll eventually become a Supreme Chef, turning dog intestines and bear kidneys into delights that send his fellow dwarves into "ecstatic" moods.
In Girl Genius, Agatha's improved coffee engine makes coffee that's perfect. And reveals to the drinker the mathematical perfection of the cup itself!
The cookies baked by Piffany in Nodwick. Armies will halt their invasions and rebuild the towns they destroyed in return for them. The gods themselves will threaten holy wars to get some, and do anything you want for the recipe. Nodwick was able to use her brownies and punch as part of a scheme to convince a mercenary army to fight off an orc horde and rebuild every single town destroyed by said horde. (The mercenaries choose the cookies over the orc chieftain's offer of allowing them a portion of the loot and their pick of the women of the conquered territory for not trying to stop them.) Oh, and you know how Nodwick is a Chew Toy for whom even his hundreds of deaths is no escape from constant mistreatment at the hands of Artax and Yeagar, and whatever monsters they encounter? He's still a lucky bastard because when Piffany makes her cookies he gets to lick the bowl.
Sam Starfall of Freefall. No, that's not a dish, that's a character. His planet lacked any mass extinction events that forced life to evolve back to its previous point, resulting in his proteins being so simple and easy to digest that even Earthly herbivores find his flesh incredibly delicious.
SCP-294 produces whatever drink you input on its little keypad. When it was asked for "the perfect drink", it made a drink so unbelievably tasty that the guy who tried it said everything afterward was a drag and committed suicide two weeks later. Two different researchers later asked for "their favorite drink". Each one got a different beverage; each one found their own drink just short of the perfect one. When they swapped the consensus was "Good, but mine's better."
SCP-807 is a plate that makes any food served on it incredibly delicious, with a literally irresistible smell and a calorie count so high that whoever eats it goes into cardiac arrest within minutes.
In Space Beasts characters often react this way to either Minsk's or Marzipan's cooking, Marzipan even has a secret weapon! Her tears when added to her food make her food even more delicious!
Also the Elves and half elves wasabi is so impossibly delicious, once they start eating they just can't stop! For Fairies and half fairies peanut butter has a similar effect. For Goblins and half goblins Bananas
The Lightbringer, Patron of Truth from the Sporewiki Fiction Universe can create this for any organism, with the result literally being the best tasting thing possible for said organism. His pet mortal, the high priest Riffrex, lives on a combination of this and an altered version designed to compromise between this and his nutritional needs. Word of God has stated that if the Lightbringer were unable to continue to supply Riffrex, Riffrex die of withdrawal very quickly, and that it would theoretically take centuries to reduce doses slowly enough to safely expunge the addiction. In addition, he stocks his moon, Isuma, with fruit trees containing more generalized ideals, as well as fauna that crawls up to you with the hope of being eaten, which grows tastier and tastier as you near, enter, and move to the center of the Lightbringer's palace, with the food in the center being impossible to resist eating.
The éclair planned to kill Homer in The Simpsons episode "Guess Who's Coming to Criticize Dinner".
Man: Come on, you're going to kill him with a pastry? I've seen this man eat a bowl of change! Chef: This éclair is over one million calories. Twenty-five pounds of butter per square inch. Covered with chocolate so dark that light cannot escape its surface. [The other restaurateurs lunge for the savoury picture.] No, no, no! This is just a picture. But Homer Simpson will find the real thing both delicious and deadly. Akira: Ah, yes, Death by Chocolate. Chef: ...and poison, I'll stick in some poison.
Homer also once made a deal with the devil for his soul in exchange for the perfect donut. He tries to cheat Flanders Satan by not finishing the donut. Until he eats the final piece while half-asleep.
There's also the trip to the gummy bear festival.
Homer: In this sweet land, donuts are foul as poison. You'd spit them out you would!
The Adventure Time episode "Tree Trunks" centers on Jake and Finn's quest to get the eponymous little green elephant through the dangerous forest so she can taste the legendary Crystal Gem Apple herself. It's so good that she vanishes into another realm, and turns into an evil goddess of said realm.
Similarly, royal tarts. They're so delicious, Princess Bubblegum has Finn and Jake escort them to a royal meeting under the possibility of theft.
Spongebob Squarepants: Krabby Patties. When Squidward eats them for the first time, he becomes obsessed with them.
Codename: Kids Next Door had the legendary Fourth Flavor, an ice cream so delicious that only the one with the purest of taste buds could find and taste it. Numbuh Five dreamed of doing so. At the end of "Operation: F.L.A.V.O.R." she got her wish, although we had to Take Her Word For It that it was as good as she imagined.
In The Adventures Of Jimmy Neutron Boy Genius, Jimmy invents the perfect candy. It's so delicious that all the people in Retroville develop an addiction to it and act like zombies, caring about nothing but getting more of his candy (luckily, Jimmy never got to try it). Jimmy, of course, saves the day through additive punishment. note He electrified the candy. Sheen still likes them, though.
The Guacamole of the Angels from El Tigre, made by maidens squashing the avocados with their feet.
Hamton J. Pig accidentally spilled a super-condiment on himself, causing everyone who met him (including Plucky) to attempt to eat him. It ends up happening to Plucky, with Hampton trying to eat him.
Aqua Teen Hunger Force had the Broodwich. A sandwich so tasty none can resist. Eating it transported you to a strange astral plane where guys with axes try to dismember you. Shake can't stop eating it though. He tapes it to the ceiling when he decides to stop eating it, but he can't stay away. Frylock chastises him get rid of the damn thing because he'll eventually give in and finish eating it. Of course, it ends up a moot point because Shake took off the sun dried tomatoes because he finds them disgusting, so he never has a desire to truly finish the sandwich. So the evil voice tries to get him to eat them, resorting to free brain surgery.
Futurama loves this trope. In Fry And The Slurm Factory, Fry is put in a death trap to drink concentrated slurm until his stomach bursts. He can't stop eating it, even long enough to save his friends. When Leela frees him from it by dumping it down the sewer, Fry tries to chew his own arms off to follow it.
The entire Earth ends up with an addiction to Popplers. They're so delicious, people even have a hard time stopping eating them when they find out the truth behind what they are. Then again, in a world of Soylent Cola, it's hardly surprising.
Also, now-extinct anchovies are that for Zoidberg's species. Expectedly, that's why they went extinct.
The cookies baked by Grim's grandmother on The Grim Adventures of Billy & Mandy were so tasty, everyone kept cheerfully eating them even after she announced that the recipe included dung beetles.
My Little Pony: Friendship Is Magic: In "MMMystery on the Friendship Express" the Marzipan Mascarpone Meringue Madness or MMMM is described as this by Rainbow Dash, Fluttershy and Rarity; to a lesser extent the other bakers' desserts (Gustave's Exceptionally Exquisite Eclairs, Doughnut Joe's Doghnutopia and Mulia Mild's Chocolate Mousse Moose) are this as well. That's why they ate each other's.
Looney Tunes: Apparently the Roadrunner himself is this at at least according to Wile E Coyote as he a explains "The Roadrunner is to the taste buds of a coyote, what caviar, champagne, filet mignon and chocolate fudge are to the taste buds of a man." He then pulls out a chart explaining that every part of the Roadrunner comes "In a dazzling array of flavors." From banana to sponge cake to candied yam to pistachio.
Passion Patties, a brand of chocolate mint cookies sold by Happy Girl Scouts from Totally Spies! are so good a single bite brings about untold euphoria, and can get you hooked just like that. This was deliberate on the half of their creator, Inga Bittersweet, who used to be a Happy Girl until she was kicked out for eating the cookies instead of selling them. So she created a highly concentrated sugar extract in order to make the cookies insanely addictive and insanely fattening, inciting riots and causing widespread obesity.
The dishes Porky cooks from his grandmother's recipes in the The Looney Tunes Show episode "Bobcats on Three!" are this, especially to Bugs. The principal ingredient is butter.
The Fairly OddParents: Nana Boom Booms brownies are super tasty that they win the annual fairy bake off every year. Their so tasty Poof goes crazy over them.
In one episode of Courage the Cowardly Dog, when Courage is searching for a storm goddess' pet dog (it's a weird cartoon) he finds that the dog has fallen under the spell of something called the God Bone, a giant bone that is so delicious that a dog who licks it will keep doing so until it starves to death. Despite a stern voice that bluntly warns anyone who enters the room of the danger, it appears that dogs simply cannot resist it. (The numerous dog skeletons surrounding it seem to confirm this.) Courage falls under its spell too, but saves himself and the other dog by somehow managing to pick the giant bone up and carry it with him.