01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan and line with parchment paper for easy removal.
02 - In a large mixing bowl, mash the bananas with a fork until smooth.
03 - Stir in melted butter, granulated sugar, brown sugar, eggs, and vanilla extract until well combined.
04 - In a separate bowl, whisk together flour, baking soda, salt, and cinnamon.
05 - Add dry ingredients to wet mixture and stir gently until just combined—do not overmix.
06 - Fold in chocolate chips, reserving a handful to sprinkle on top if desired.
07 - Pour batter into prepared loaf pan. Sprinkle reserved chocolate chips on top.
08 - Bake for 50–60 minutes, or until a toothpick inserted into the center comes out clean or with moist crumbs (not wet batter).
09 - Cool in pan for 10 minutes, then transfer to wire rack to cool completely before slicing.