INGREDIENTS
1/2 cup
white whole wheat flour
2 1/2 tbsp
Dutch-process cocoa
1/3 cup
brown sugar
1/2 tsp
baking powder
1/8 tsp
salt
1
egg
1 tsp
vanilla extract
2 tbsp
vegetable oil
1/2 cup
(about 1 large) mashed ripe banana
1/4 cup
(heaping) semi-sweet chocolate chips, plus additional for topping