Step 1

Preheat oven to 375 degrees.

Step 2

For the caramelized topping:

Step 3

Melt 1 tablespoon of butter over medium heat in a seasoned 8 inch cast iron skillet. Remove from heat. Sprinkle in 3 tablespoons of brown sugar and arrange the bananas in a single layer. Set aside.

Step 4

Mix the all purpose and whole wheat flours, baking soda, salt and cinnamon in a medium bowl.

Step 5

Cream the sugar and butter. Whisk in the egg, yogurt and bananas until well blended. Add the vanilla extract. Combine this mixture with the dry ingredients until well blended.

Step 6

Pour the cake batter over the banana, sugar and butter topping in the skillet.

Step 7

Bake in the middle of the oven at 375 for 30 minutes or until a toothpick inserted in the center comes out clean.

Step 8

Working quickly, invert the cake onto a wire rack or plate to cool. Serve warm.

Step 9

(Don't allow the cake to cool in the skillet. You won't get to see that yummy caramelized banana topping.)