Preheat oven to 350°F

Mix flour, baking powder, and baking soda

Beat butter and granulated sugar in a large bowl with mixer until light and fluffy

Blend in eggs

add bananas and vanilla mix well

Add flour mixture to butter mixture alternately with sour cream mixing well after each addition

Pour half the batter into a 13 by 9 inch pan sprayed with cooking spray

Mix brown sugar and cinnamon sprinkle half of that mixture over batter in pan

Top with half of the chocolate chips

Repeat the layer

Bake 50 to 55 minutes or until a toothpick inserted into the center comes out clean