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, sugar, eggs, flour, and baking powder. The cake is moist, fluffy, and has a rich peanut butter and banana flavor. You can serve it plain or with a dollop of peanut butter frosting or whipped cream. This cake is sure to be a hit with peanut butter lovers.