Preheat oven to 350°F (175°C) and grease a 9x5-inch loaf pan.

Mash 3-4 ripe bananas until smooth, ensuring no lumps.

Mix melted butter into mashed bananas, then stir in brown sugar and vanilla extract until glossy.

In another bowl, whisk together flour, baking soda, and salt.

Combine dry ingredients with wet ingredients, being careful not to overmix.

Fold in chocolate chips and walnuts until evenly distributed.

Pour batter into the prepared loaf pan and smooth the top.

Bake for 60-70 minutes until golden brown and a toothpick comes out with moist crumbs.

Tent with foil if browning too quickly, then cool in pan for 10 minutes before transferring to a wire rack.

Let the banana bread cool completely before slicing.