Banana Cake with Fudge Frosting

Preheat the oven to 350 degrees F. Lightly grease an 8-inch square baking pan.

TO MAKE THE CAKE: In a bowl, mix the bananas with the sugar and let stand for 10 minutes. In a second bowl, combine the dry ingredients. In a third bowl, whisk together the oil, milk, eggs, and vanilla. Stir in the bananas. Then stir the dry ingredients into the wet ingredients to make the batter. Quickly stir in the nuts.

Spread the batter evenly in the prepared baking pan. Bake for 45 to 50 minutes, or until a wooden toothpick comes out clean. On a rack, cool the cake for 10 minutes, then remove it from the baking pan. Let the cake cool completely before frosting.

TO PREPARE THE FROSTING: In the top of a double boiler, over gently simmering water, melt the chocolate, stirring occasionally. Put the nonfat sour cream into a bowl, then quickly stir the melted chocolate into it.

Frost the cake immediately. Cut the cake into squares to serve.