<P> Variations on the sandwich can be created by changing the jelly to honey or fruit slices and instead of peanut butter, someone may use almond butter or another nut butter . When marshmallow fluff is substituted for the jelly, the sandwich becomes a fluffernutter . </P> <P> A 2002 survey showed the average American will have eaten 1,500 of these sandwiches before high school graduation . </P> <P> Peanut butter was originally paired with a diverse set of foods, such as pimento, cheese, celery, watercress, and toasted crackers . In a Good Housekeeping article published in May 1896, a recipe "urged homemakers to use a meat grinder to make peanut butter and spread the result on bread ." The following month, the culinary magazine Table Talk published a "peanut butter sandwich recipe . In the early 1900s, this sandwich was adopted down the class structure as the price of peanut butter dropped . It became popular with children by the 1920s as manufacturers began adding sugar to the peanut butter . Since World War II, both peanut butter and jelly were found on US soldiers' military ration list . </P> <P> A peanut butter and jelly sandwich made with white bread, two tablespoons each of peanut butter and strawberry jelly, provides 27% of a person's Recommended Daily Intake of fat and 22% of their calories . </P>

Who came up with the peanut butter and jelly sandwich