Follow these simple steps to create your own delicious Banana Upside Down Cake:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C). Prepare a 9-inch round cake pan by greasing it with butter and lining it with parchment paper.

2. Prepare the Topping: In a saucepan over medium heat, melt the butter. Stir in the brown sugar until the mixture is smooth. Remove from heat and pour it into the prepared cake pan.

3. Arrange Bananas: Lay the sliced bananas evenly on top of the butter-sugar mixture in the pan. If you’re using nuts, sprinkle them over the bananas now.

4. Mix Dry Ingredients: In a separate bowl, whisk together the flour, baking powder, and salt. Set aside.

5. Combine Wet Ingredients: In a large mixing bowl, cream the granulated sugar and remaining butter until light and fluffy. Then, add the eggs, vanilla extract, and buttermilk, mixing until well combined.

6. Combine Mixtures: Gradually add the dry mixture to the wet ingredients, stirring well until you have a smooth batter.

7. Pour the Batter: Carefully spoon the batter over the arranged bananas in the cake pan, ensuring even distribution.

8. Bake: Place the cake in the preheated oven and bake for 35-40 minutes, or until a toothpick inserted in the center comes out clean.

9. Cool: Once baked, remove the cake from the oven and allow it to cool in the pan for about 15 minutes. Then, carefully invert it onto a serving plate.

10. Cool Completely: Let the cake cool for another 10-15 minutes before slicing and serving.

Enjoy the sweet, comforting taste of your freshly baked Banana Upside Down Cake!