Jaffa Cakes, the commercial was originally a bit of an insult towards sweet tooths and a Scare 'Em Straight towards kids, but the kids who ate themselves into a chocolate coma looked so utterly fulfilled it completely ruined the point they were trying to make (sweets are bad). Eventually a company wound up making the fictional sweet into a real thing, which is very popular in the UK.
I have been looking through Google, and been utterly unable to figure out what commercial the example is referring to. However, whatever it is, I doubt it predates the invention of Jaffa Cakes in 1927.
EDIT: Okay, I think I've found it now. It's from 2001 and the fictional product is called a Gofer Cake, and bears little resemblence to a Jaffa Cake beyond chocolate-cakeyness (and even then, it has more chocolate than a Jaffa Cake.)
Pulled this:
I have been looking through Google, and been utterly unable to figure out what commercial the example is referring to. However, whatever it is, I doubt it predates the invention of Jaffa Cakes in 1927.
EDIT: Okay, I think I've found it now. It's from 2001 and the fictional product is called a Gofer Cake, and bears little resemblence to a Jaffa Cake beyond chocolate-cakeyness (and even then, it has more chocolate than a Jaffa Cake.)
Edited by DaibhidC