Creating Banana Upside Down Cake is straightforward if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Bananas: Slice the bananas into thick rounds and set aside.
3. Make the Topping: In a skillet, melt the butter over medium heat. Add brown sugar and stir until dissolved, forming a syrup.
4. Arrange Bananas: Pour the syrup into a greased 9-inch round cake pan. Arrange the banana slices over the syrup evenly.
5. Mix Dry Ingredients: In a large bowl, whisk together flour, granulated sugar, baking powder, baking soda, and salt.
6. Combine Wet Ingredients: In another bowl, mix sour cream, vegetable oil, eggs, and vanilla extract until smooth.
7. Combine Mixtures: Gradually add the wet mixture to the dry ingredients. Stir until just combined, being careful not to overmix.
8. Pour Batter: Carefully pour the batter over the arranged banana slices in the cake pan.
9. Bake: Place the pan in the preheated oven and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
10. Cool: Remove from the oven and let the cake cool in the pan for about 10 minutes before inverting onto a serving plate.
11. Serve: Allow to cool slightly before slicing and serving.

By following these simple steps, you’ll create an incredible Banana Upside Down Cake that family and friends will love.