Harry Potter: A load of soggy brown stuff.
The method involves the quarant (the person getting their fortune told) being provided with a cup of a particular drink (Tea, Coffee and Wine being the most common forms). They are asked to drink from a specific cup, leaving a small amount for the leaves and/or pulp to gather. The leaves/pulp then form a variety of shapes, from animals to inanimate objects, even mythical creatures and specific people. These shapes hold symbolic significance, their presence spelling things ranging from good fortune to omens of doom.
- In one of Professor Trelawney's Divination classes in Harry Potter and the Prisoner of Azkaban, she has her class read each other's fortunes through tea leaves. Trelawney reads Harry's cup and sees a falcon (a deadly enemy), a club (an attack), a skull (danger) and the Grim, a spectral dog considered an omen of death. In Harry Potter and the Order of the Phoenix, reading tea leaves is part of the Divination exam, where Harry fails completely and tells his examiner that she'll meet "a round, dark, soggy stranger".
- Miss Spink and Miss Forcible in Coraline (both the book and its animated adaptation) read Coraline's fortune when she comes to visit them. Miss Spink thinks that she is in terrible danger (seeing a "very peculiar hand"), while Miss Forcible thinks there is a "tall, handsome beast" in her future (seeing a giraffe).
- In one Mrs Pepperpot story, Mrs. Pepperpot reads her tea leaves and accidentally reads her husband's. According to her, tea leaves in the shape of a heart means a new loved one will arrive, a cross means she'll need a doctor, and a clear drop means tears.
- In Wicked, Nanny goes to Old Yackle to get medicine that will supposedly stop Melena's unborn baby from being born green like her sister (the pills actually lead Nessarose to be born armless). When there, Yackle reads Nanny using leaves and herbs, but it's noted her vision is poor and Nanny doesn't buy her fortune-telling.
- Occasionally mentioned in the Witches subseries of Discworld. Generally speaking the witches don't believe tea leaves predict anything except how strong the tea is, but it's something people expect of witches and staring at some sort of random pattern gets your mind in the right place. And, the Disc being what it is, just occasionally (as in Maskerade) it works.
- In Don Callander's fantasy series that begins with Pyromancer, tasseomancy is the province of acquamancers, wizards who have an affinity with water. It's said that the water is the actual medium of the prophecy and the tea leaves just give it something visible to work with.
- With the lack of worshippers in America keeping them strong and prosperous, what remains of the Slavic Gods in American Gods have resorted to doing odd jobs to get by. Czernobog (being recognized as a God of Death) keeps himself strong killing cows at a meat processing factory, while the Zorya Sisters do fortune-telling. Zorya Vechernyaya in particular practices tasseomancy using Turkish coffee as her medium, insisting on reading Shadow and Mr. Wednesday's fortunes when she agrees to let them into their house. Shadow's fortune is implied to be so horrible that even she can't properly lie about it.
Shadow: Thought you were supposed to read tea-leaves.
Zorya Vechernyaya: Tea is disgusting. [Zorya Utrennyaya glimpses Shadow's fortune. Shows it to Vechernyaya.]
Shadow: So what does it say?
Zorya Vechernyaya: ...you will have long life and a happy one with many children.
Shadow: That bad, huh? Any good news?
Zorya Vechernyaya: Your mother die of cancer?
Zorya Vechernyaya: You no die of cancer.
- In Deadly Premonition, Francis York Morgan sees omens in his morning coffee, looking for images in the foam after he adds cream. On his first morning in Greenvale, he sees the letters F and K in his coffee, which turns out to be completely accurate. F.K. are the initials of The Man Behind the Man in the case York's investigating.
York: Did you see that, Zach?! Clear as a crisp spring morning! "F K"... in the coffee! I knew I could count on it. It never fails.