1 box yellow cake mix
3/4 tsp. baking powder
1/2 c. nuts
1 1/2 c. mashed bananas (3 med.)
3 eggs
1/2 c. water
1/3 c. vegetable oil

Mix together and pour into greased 9 x 13 inch pan. Mix with fork until crumbly 1 cup sugar, 1 cup flour, and 1 stick butter (softened). Sprinkle over batter. Bake at 350 degrees for 40 to 45 minutes.