01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan or line with parchment paper.
02 - In a large bowl, whisk mashed bananas, eggs, melted butter, granulated sugar, brown sugar, and vanilla extract until smooth.
03 - In a separate bowl, whisk together flour, baking soda, salt, cinnamon, and nutmeg.
04 - Gently fold dry ingredients into wet mixture with a spatula until just combined, avoiding overmixing.
05 - Fold in nuts and/or chocolate chips if desired.
06 - Pour batter into prepared pan and smooth the top evenly.
07 - Bake for 50 to 60 minutes until a toothpick inserted in the center emerges clean or with a few moist crumbs.
08 - Allow to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.