Preheat oven to 350°. Spray a 9x5-inch loaf pan with nonstick cooking spray.

Cream butter and sugar in the bowl of an electric mixer or hand mixer.

Add the bananas, eggs, sour milk, salt, and baking soda to a blender. Mix until liquefied or mash the bananas with a fork and stir in the eggs, milk, and baking soda.

Pour half of the banana mixture into the butter mixture with 1 cup of flour and mix until just combined. Repeat with the rest of the liquid and flour. Do not overmix!

Stir in 1 1/2 cups chocolate chips.

Pour into prepared pan. Sprinkle with remaining chocolate chips. Bake approximately 50-60 minutes or until a toothpick comes out mostly clean.

Cool at least 10 minutes in pan before removing and slicing.