Let’s dive into the process of creating this delightful cake. Remember, cooking is about joy, so enjoy each step!

1. Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan generously with butter.
2. Pour the melted butter into the bottom of the prepared pan, then sprinkle the brown sugar evenly over the butter.
3. Arrange the sliced bananas over the sugar and butter mixture, ensuring they cover the bottom of the pan.
4. In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
5. In a large mixing bowl, beat the granulated sugar and eggs until well combined and slightly thickened, about 2 minutes.
6. Add the vanilla extract, buttermilk, and sour cream to the egg mixture, mixing until smooth.
7. Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Be careful not to overmix as it can make the cake dense.
8. Pour the batter over the bananas in the prepared pan, spreading it evenly with a spatula.
9. Bake for 40-45 minutes, or until a toothpick inserted into the center of the cake comes out clean.
10. Allow the cake to cool in the pan for about 10 minutes, then carefully invert it onto a serving plate. The sight of the caramelized bananas will be worth the anticipation!