Preheat oven to 350 degrees F. Butter and Flour a Bread Loaf Pan. In a bowl, mix butter, sugar, egg. In separate bowl, mash bananas until chunky/creamy - add to mixing bowl, mix. In separate bowl, mix flour, baking soda, salt - add to mixing bowl, mix. Add 3/4 chocolate chips, mix. Pour into Pan. Sprinkle rest of chocolate chips on top. Bake for 55-65 min.