I think maybe Berite Bott's Every Falvour Beans, simply because of the randomness of the flavours you can get! I can just imagine sitting there with my friends and how much fun we'd have daring each other to try the next one. There's also those sweets that made Ron, Neville, Harry and this other boy (who I can't remember) act like animals, which would be hilarious if it existed! I also like the enchanted chocolate frogs. Though, I'd probably end up not wanting to eat it if it was moving about like it was alive! :)
butterbeer, chocolate frogs, and blancmange, or that food that ron, harry, neville and whoever-he-is was eating, the one with a spell and such (in POA)
