21. Peanut Butter and Jelly
While both peanut butter and jelly (or jam) are common spreads for bread and for toast, the combination of peanut butter and jelly flavors is largely an American tradition. Like when pairing peanut butter with chocolate, it seems to be the saltiness and savory nature of the peanut butter that makes it work really well with the jelly. After all, jelly does tend to be a bit over-sweet, especially if you are eating a high sugar type.
20. Raspberry and Chocolate
Raspberry and chocolate is another combination that works great because of the contrast in flavors. Chocolate tends to be sweet and smooth, while raspberries are also sweet, but have this little tart note. That tartness is what works well with the chocolate, and helps to give dishes a bit more depth of flavor.
19. Pizza and Beer
Pizza and beer is a really classic combination, although the exact flavors involved are going to depend on what beer you are drinking and on the type of pizza. Looking for a beer that isn't too sweet is probably a good idea, as sweetness is not the best option to complement a pizza.