Preheat your oven to 350°F (175°C) and grease two 9-inch round cake pans.
In a bowl, combine flour, baking powder, and baking soda.
In another bowl, cream the butter and sugar until light and fluffy.
Add the mashed bananas and mix well.
Incorporate the eggs and vanilla extract into the mixture.
Gradually add the dry ingredients, alternating with buttermilk.
Pour the batter evenly into the prepared pans.
Bake for 25-30 minutes, or until a toothpick comes out clean.
Let the cakes cool in the pans for 10 minutes, then transfer to wire racks.
Layer with chocolate and vanilla frosting, then decorate with bananas, cherries, and sprinkles.