Bertie Bott's Every Flavour Beans were invented by Bertie Bott and are one of the most popular sweets in the wizarding world. They are almost the same as Muggle jelly beans, except the range encompasses every flavour imaginable. There is also no way of telling for sure what flavour any given bean is without tasting it, although you can try and guess by the colour.
There are ordinary flavours like chocolate, peppermint, and marmalade, but also less fanciable ones like spinach, liver, and tripe. There are also flavours that are not actual foods like; grass, farm dirt, vomit, earwax, paper, and bogeys.