Bake your favorite banana cake recipe. Cool the baked cake completely then slice the layers horizontally with dental floss, creating four layers. In between each layer, spread some whipped cream, spread sliced banana, then spread a little more whipped cream before adding next layer of cake, then repeat for additional layers. Chill cake for at least one hour before serving. For variations, you can add chocolate chips to the cake batter and/or drizzle chocolate syrup between layers.