BLACK BOTTOM BANANA BARS

BLACK BOTTOM BANANA BARS
Jen Fuhriman

1/2 cup margarine...I use Fleischmann's..
1 cup sugar
1 egg
1 tsp. vanilla
1 1/2 cup mashed ripe bananas
1 1/2 cup all purpose flour
1 tsp. baking powder
1 tsp. baking soda
1/2 tsp. salt
1/4 cup baking cocoa

In a mixing bowl, cream butter and sugar. Add egg and vanilla;beat until thoroughly combined. Blend in the bananas. Combine the flour, baking powder, baking soda, and salt; add to creamed mixture and mix well;Divide batter in half. Add cocoa to half, spread into a greased 9X13 baking pan. Spoon remaining batter on top and swirl with a knife. Bake @ 350 for 25 minutes or until the bars test done....