Preheat the oven to 350°F and coat a 9-inch loaf pan with non-stick spray.
Using either an electric hand mixer or a stand mixer, blend the melted butter and brown sugar together. Incorporate the vanilla, eggs, and mashed banana.
Gradually add the flour, baking soda, and salt to the wet mixture, mixing until just combined. Be careful not to overmix.
Fold in the chocolate chips.
Pour the batter into the prepared loaf pan. Sprinkle the top of the banana bread with extra brown sugar.
Bake at 350°F for 55-60 minutes, ensuring it passes the toothpick test (a toothpick comes out clean or with moist crumbs on it) before removing from the oven.
Allow the bread to cool slightly or completely before slicing, depending on your preference. Enjoy!