This banana blueberry cake recipe is perfect for those who love the combination of bananas and blueberries. The cake is made with ripe bananas, fresh blueberries, butter, sugar, eggs, flour, baking powder, and baking soda. It's moist, fluffy, and has a delicious banana and blueberry flavor. You can serve it plain or with a cream cheese frosting. This cake is easy to make and will become a family favorite in no time.