I had made half a box of mini cupcakes and wanted to do something fun with the other half of the batter so I decided to make some peanut butter and jelly whoopie pies. They taste like a sweet peanut butter and jelly sandwich. I didn't see any recipes for anything like these on here so I figured I would share. I've only made these once so I'm sure there are improvements that could be made. I might use chocolate instead of white cake mix next time to make them a little more different. Caloric content is a bit high, at about 230 calories per pie (using egg beaters and reduced sugar jam) but more than worth it.