Snickers

What is it?

Four layers and the order matters. Nougat on the bottom, caramel over it, peanuts through the caramel, milk chocolate around the outside. The peanuts are what separate it from every other filled bar, since they bring salt and a hard snap to something otherwise soft the whole way through. That salt does real work. Caramel and nougat are both built on sugar with nothing sharp anywhere in them, and without the peanuts the bar would run in one direction from the first bite to the last. In Britain it was called Marathon until 1990, when Mars brought the name into line with the rest of the world. The original name comes from a horse the Mars family owned, which isn't the sort of thing a brand would choose now.