There is no chocolate in a Cadburys Chomp.
Check for yourself. According to the wrapper a Chomp is: “Delicious Wafer Biscuit and Caramel covered in a Chocolate Flavoured Coating”.
A little research revealed that Chomps are coated in a substance known as compound chocolate. Compound chocolate is basically a cheaper and easier alternative to the real deal.
In fact, a little more Googling reveals that Chomps are really bottle of the barrel stuff. This article from “The Chocolate Blog” made me feel cheap for liking Chomps…