Spray 9x13 inch baking pan with non-stick cooking spray.
3
In a medium bowl, combine flour, baking powder, baking soda, and salt. Set aside.
4
In a large bowl, beat together sugar, eggs, and butter on medium speed. Add bananas, sour cream, and vanilla. Beat until smooth.
5
Gradually add flour mixture to banana mixture, beating after each addition. Batter will be thick. Fold in chocolate chips.
6
Pour batter into prepared pan and spread evenly. Bake for 25-28 minutes, or until a toothpick inserted in the center of the cake comes out clean. Cool completely and cut into 16 pieces.
