This peanut butter banana cake recipe is perfect for those who love the combination of peanut butter and bananas. It's made with ripe bananas, peanut butter, flour, sugar, and eggs. The cake is moist, fluffy, and has a rich peanut butter flavor. You can also add chopped peanuts to the batter for an extra crunch. Serve it with a peanut butter frosting or a drizzle of chocolate for a delicious treat.