01 - Preheat the oven to 350°F. Grease and line a 9x5-inch loaf pan with parchment paper.
02 - In a large bowl, whisk together the mashed bananas, eggs, melted butter, brown sugar, granulated sugar, and vanilla until smooth.
03 - In a separate bowl, sift together the flour, baking soda, salt, and cinnamon.
04 - Add the dry ingredients to the wet ingredients and gently fold together until just combined. Do not overmix.
05 - Fold in the chocolate chips and walnuts, reserving a few of each for sprinkling on top if desired.
06 - Pour the batter into the prepared loaf pan. Sprinkle reserved chocolate chips and walnuts on top.
07 - Bake for 50-60 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs attached.
08 - Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.