Heat oven to 350 degrees F.

In large mixing bowl beat with electric mixer the oil and sugar. Add bananas and vanilla and beat until blended; add eggs one at a time and beat until blended.

In separate bowl, whisk together all dry ingredients (except chocolate chips). On low speed, add to the banana mixture until combined. Stir in milk and optional chocolate chips and stir until well-blended.

Add batter to greased and floured loaf pan. You can also use a pan with four small loaves (like photo below), but make sure to adjust cooking time.

Bake for about 55 minutes or until deep golden brown and a toothpick comes out dry when inserted in the top.