01 - Preheat oven to 350°F. Grease a 9×5-inch loaf pan or line with parchment paper.
02 - In a large bowl, whisk together the mashed bananas, melted butter, granulated sugar, brown sugar, eggs, and vanilla until smooth.
03 - In a separate bowl, whisk together the flour, baking soda, baking powder, and salt.
04 - Add the dry ingredients to the wet mixture and gently fold until just combined. Do not overmix.
05 - Fold in the chocolate chips and nuts (if using).
06 - Pour the batter into the prepared loaf pan. Sprinkle additional chocolate chips on top, if desired.
07 - Bake for 50–60 minutes, or until a toothpick inserted in the center comes out with just a few moist crumbs.
08 - Cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.