Preheat oven to 350.
Line a 13x9 pan with aluminum foil, spray with non-stick spray.
In a mixing bowl fitted with the paddle attachment mix the banana, oil, milk, vanilla and eggs until combined.
Add in the cinnamon, baking soda, salt and flour until fully mixed.
Fold in the chocolate chips.
Pour batter into prepared pan and bake for 25-30 minutes.
Cut into bars.