1 pkg. devil's food cake mix (Duncan Hines)
1 (3 oz.) pkg. regular chocolate pudding mix
1/2 c. sugar
1/2 tsp. baking soda
1/4 tsp. salt
4 eggs
1 c. mashed banana
3/4 c. water
1/2 c. cooking oil
1/2 tsp. butter flavoring

Combine all ingredients in mixer bowl. Beat at medium speed until mixed, then at high speed for 4 minutes. Turn into 2 (9") or 3 (8") greased and waxed paper lined cake pans. Bake at 325 degrees for 50 minutes or until done. Frost with your favorite frosting when cool.