This peanut butter banana cake recipe is perfect for those who love the combination of peanut butter and bananas. Made with ripe bananas, flour, sugar, peanut butter, eggs, and butter, this cake is moist, nutty, and delicious. Simply mix all the ingredients together, pour the batter into a greased baking pan, and bake for 35-40 minutes. Serve with a peanut butter frosting or a drizzle of caramel sauce.