INGREDIENTS
1 1/2 cups
all-purpose flour
1/2 cup
sugar
1/4 cup
light brown sugar
1 tsp
baking powder
1 tsp
baking soda
1/2 tsp
salt
3
large bananas, mashed well
2 tsp
vanilla extract
1
large egg
1/3 cup
vegetable oil
1/4 cup
sour cream
1 cup
chocolate chunks, divided