Preheat the oven to 350°F (175°C) and grease two 9-inch round cake pans.
In a mixing bowl, cream together the softened butter and sugar until light and fluffy.
Add the eggs one at a time, mixing well after each addition.
Stir in the mashed bananas and vanilla extract.
In another bowl, combine the flour, baking powder, baking soda, and salt.
Gradually add the dry ingredients to the banana mixture, alternating with the buttermilk.
Divide the batter evenly between the prepared cake pans.
Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
Let the cakes cool in the pans for 10 minutes, then transfer them to a wire rack to cool completely.
Layer the cakes with whipped cream, chocolate sauce, and caramel sauce between them.
Top the cake with more whipped cream and garnish with fresh fruits.