Was peanut butter and jelly one of your favorite lunchbox sandwiches? Little did you know then what amazing desserts PB&J would star in: cupcakes, bars and squares, pies and even parfaits! And of course the basic stuff. If you know how to make peanut butter cookies, all it takes is a bit of jam on top. (This works with other kinds of peanut butter treats, too.) Or you could make your own homemade jelly if you like—and experiment from there. The possibilities are delicious!