Cream the butter with sugar in mixing bowl with paddle attachment.
Mix in egg until combined.
Add in sliced banana, milk, molasses and vanilla.
Mix in the flour, baking powder, baking soda, pumpkin pie spice and salt.
Stir in chocolate chips.
Line a 13×9 pan with parchment paper and spray with a baking spray.
Spread batter in pan and bake at 350 degrees for 30-35 minutes or until toothpick comes out clean.