Preheat the oven to 350°F (175°C).

In a mixing bowl, mash the bananas.

Add melted butter to the mashed bananas and mix well.

Stir in sugar, beaten eggs, and vanilla extract.

Combine flour and baking powder in a separate bowl.

Gradually add the dry ingredients to the banana mixture, alternating with milk.

Pour the batter into a greased cake pan.

Bake for 45 minutes or until a toothpick inserted into the center comes out clean.

Let the cake cool completely before frosting with cream cheese frosting.