Preheat Oven to 350˚F. Butter and flour a bread loaf pan (9.25"L x 5.25"W x 2.75"D)
Cream Butter and Sugar – In a mixing bowl using paddle attachment, cream together 1/2 cup softened butter and 2/3 cup sugar. Add 2 lightly beaten eggs.
Mash bananas with a fork until consistency of chunky applesauce and add them to the mixing bowl along with 1/2 tsp vanilla extract. Mix until blended.
Whisk together dry ingredients in a separate bowl: 1 1/2 cups flour, 1 tsp baking soda and 1/2 tsp salt. Add to the mixing bowl and mix until incorporated.
Fold in 3/4 cup chocolate chips then transfer to prepared bread pan. Sprinkle remaining 1/4 cup chocolate over the top and bake at 350˚F for 55-65 minutes or until a toothpick inserted into the center comes out clean. Let banana bread rest 10 min before transferring to a wire rack to cool.