Mix flour, sugar, brown sugar, baking powder, salt, oil, milk, egg and mashed bananas. Beat on low to medium speed for 30-45 seconds.
Mix in the chocolate chips and walnuts until thoroughly combined.
Pour the mixture into your loaf pan.
Bake in the oven for 50-60 minutes or until a toothpick comes out clean. Note: If you use smaller loaf pans be sure to cut down the cook time. If I use smaller loaf pans, I usually start checking the bread after 30 minutes.
Let cool and remove your bread from the loaf pan. Let completely cool before slicing. Enjoy!