Making Banana Upside Down Cake is as enjoyable as it is simple. Follow these steps for a perfect result:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a round 9-inch cake pan.
2. Prepare the Topping: In a saucepan over medium heat, melt the butter. Stir in the brown sugar and cinnamon, mixing until smooth and bubbly.
3. Add Bananas: Pour the butter mixture into the prepared cake pan. Slice the bananas and arrange them evenly on top of the sugar mixture.
4. Mix Dry Ingredients: In a bowl, whisk together the flour, baking powder, baking soda, and salt.
5. Mix Wet Ingredients: In another bowl, beat the eggs with granulated sugar until light and fluffy. Add the vanilla extract and buttermilk, mixing well.
6. Combine Mixtures: Gradually add the dry ingredient mixture to the wet mixture, stirring until just combined. Do not overmix.
7. Pour Batter: Carefully pour the cake batter over the bananas in the cake pan, ensuring it covers them completely.
8. Bake: Bake in the preheated oven for 30-35 minutes or until a toothpick inserted in the center comes out clean.
9. Cool the Cake: Allow the cake to cool in the pan for about 10-15 minutes. This helps in firming it slightly for easier handling.
10. Invert the Cake: Carefully run a knife around the edges of the pan. Place a serving plate on top of the cake pan and flip it over to release the cake.

Following these steps will lead you to a delicious Banana Upside Down Cake that will surely impress anyone lucky enough to share it with you!