Sift together flour, baking soda, baking powder, and salt.
In a large bowl, cream sugar and butter. Beat the egg slightly, and mix into the creamed mixture with the bananas. Mix in sifted ingredients until just combined. Stir in milk and chocolate chips. Spread batter into a greased 9x5 inch loaf pan.
Bake at 350 degrees for one hour or until toothpick comes out clean with no batter