This banana blueberry cake recipe is perfect for those who love the combination of bananas and blueberries. It's made with ripe bananas, fresh blueberries, flour, sugar, and eggs. The cake is moist, fluffy, and has a sweet banana and blueberry flavor. You can also add lemon zest to the batter for an extra kick. Serve it with a cream cheese frosting or a dollop of whipped cream for a delicious treat.