Step 1

Preheat the oven to 350 degrees Fahrenheit. Butter the sides of an 8 inch deep (preferably 2 inches tall) round cake pan. Set aside.

Step 2

Mix the melted butter, brown sugar and rum in a large bowl. Pour into the prepared cake pan. Arrange the bananas in a single layer on the bottom of the cake pan.

Step 3

In a large bowl, whisk the eggs, granulated sugar, brown sugar and vanilla extract until evenly combined.

Step 4

Add the melted butter and sour cream and whisk again until the batter is smooth.

Step 5

In a medium bowl, combine the flour, baking powder and salt, mixing with a whisk, fork or sift all the ingredients together, until all the ingredients are evenly mixed.

Step 6

Add the dry ingredients to the large bowl with the batter and mix just until the batter comes together. Don't over mix.

Step 7

Pour the cake batter over the banana layer in the cake pan. Bake in the preheated oven for 35-40 minutes, until a toothpick inserted into the center of the cake comes out clean.

Step 8

Cool the cake in the cake pan for about 10 minutes. Loosen the cake from the cake pan by running a knife or a very thin spatula around the sides of the cake. Invert the cake onto your serving plate.