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. Then incorporate the vanilla, eggs, and mashed banana.
Gradually add the flour, baking soda, salt and 1/2 cup of the chopped nuts to the wet mixture, mixing until just combined. Be careful not to overmix.
Pour the batter into the prepared loaf pan.
Onto the batter in the pan, sprinkle the top of the banana bread with extra brown sugar and the remaining chopped nuts.
Bake at 350°F for 55-60 minutes, ensuring it passes the toothpick test before removing from the oven.
Allow the bread to cool slightly or completely before slicing, depending on your preference. Enjoy!