Chocolate + Peanut Butter + Cupcakes = Yes. At first I thought it was chocolate chip cookie dough on the very top-- which makes me think that could be tried, too. Chocolate batter, gob of peanut butter in the middle, cookie dough on top.
Good, but took a long time to bake. Possibly because I used frozen bananas. Would use room temp bananas next time. Easy Cinnamon Swirl Banana Bread - a recipe for all of you who love banana bread and warm, gooey cinnamon rolls!