Banana Chip Bars

¾ c. margarine
2 medium bananas
2/3 c. sugar
2 c. flour
2/3 c. brown sugar
2 t. baking powder
1 egg
1 t. salt
1 t. vanilla
1 c. chocolate chips

Cream together margarine, sugar, and brown sugar until light & fluffy.
Add eggs and vanilla; beat well.
Stir in mashed banana.
Add dry ingredients and beat until well combined.
Stir in chocolate chips.
Spread evenly in greased and floured 9x13 pan. Bake at 350 degrees for 25 minutes.