Top 10 Unexpected Cake Ingredients

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Peanut Butter and Jelly
Peanut butter and jelly are already a kid's favorite.
Peanut butter and jelly are already a kid's favorite.
Leland Bobbe/Digital Vision/Getty Images

While many unexpected cake ingredients may make you think twice about taking a bite, peanut butter and jelly will surely delight your guests. The classic kid sandwich is used in many cake recipes, typically with the jelly acting as a filling and the peanut butter as a frosty topper. Make sure you have a large glass of milk standing by to wash it down.