What goes on top the peanut butter or jelly?

The answer is "Bread".

Peanut butter and jelly sandwiches are a popular food, especially for children. They are made with two slices of bread, peanut butter, and jelly. The peanut butter and jelly are usually spread on one side of each slice of bread, and then the two slices are put together. Sometimes, people will add other things to their peanut butter and jelly sandwiches, such as bananas or bacon.