Preheat oven to 350. Grease an 8×8 inch baking pan.
In a large bowl, mix flour, sugar, baking powder and salt.
In a separate bowl, combine bananas, egg, melted butter and milk.
Stir banana mixture into flour mixture until just blended.
Stir in chocolate chips.
Pour batter into pan and bake until toothpick inserted into center of cake comes out clean, about 30-35 minutes. (It may have some melted chocolate on it but no crumbs)
Vow not to listen to children who swear they will eat all the fruit you buy. Until the next time they ask.