Instructions:
Prepare the pan: Melt butter in a 9-inch round cake pan. Arrange sliced bananas evenly on the bottom of the pan. Sprinkle sugar over the bananas.
Make the batter: In a bowl, whisk together egg, milk, salt, and vanilla extract.
Combine dry ingredients: In a separate bowl, whisk together flour and baking powder.
Mix wet and dry ingredients: Gradually add dry ingredients to wet ingredients, mixing until just combined.
Pour batter: Pour batter over the banana layer in the prepared pan.
Bake: Bake in a preheated oven at 350°F (175°C) for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
Invert and serve: Let the cake cool in the pan for 10 minutes. Invert onto a serving plate and serve warm.
