<Li> Peanut Butter and Jelly Sandwich </Li> <P> A peanut butter and jelly sandwich, or PB&J, includes one or more layers of peanut butter and one or more layers of either jelly or jam on bread . Sometimes the sandwich is eaten open - faced or with one slice of bread folded over (effectively a "half sandwich"). </P> <P> Variations on the sandwich are known to be made . Jelly to honey or fruit slices and instead of peanut butter . Now with the popularity of almond butter, some people are transiting to almond butter and jelly sandwiches . Marshmellow fluff can also be substituted for the jelly or just added for extra flavor . This sandwich would be called a fluffernutter . </P> <P> A 2002 survey showed the average American will have eaten 1,500 of these sandwiches before high school graduation . </P>

Who invented the first peanut butter and jelly sandwich