CRUMB MIXTURE:

1 box dry pecan-coconut frosting
5 tbsp. melted butter

Mix together until crumbly. Set aside.

CAKE MIXTURE:

1 box yellow cake mix
1 c. sour cream
4 eggs
2 bananas, mashed

Beat together for 2 minutes. Pour half of batter into a 9x13 pan. Sprinkle half of crumb mixture on top. Pour remaining batter on top of above. Then sprinkle with remaining crumbs on top. Bake at 350 degrees for 35-40 minutes.