1In a saucepan over low to medium heat, melt 1 stick of unsalted butter until bubbling and starting to brown. Remove from heat immediately and let cool for 10 minutes.
2Add 1/2 cup of brown sugar to the cooled brown butter and whisk until fully combined.
3Add 3 mashed bananas and whisk to combine.
4Add one egg and a whole lot of vanilla extract and whisk to combine.
5Fold in 1 cup flour, baking soda, and salt until just combined.
6Stir in as many chocolate chips as desired.
7Pour batter into a lined loaf pan and top with more chocolate chips.
8Bake at 350°F for about one hour, covering halfway through with aluminum foil to prevent charring.
9Let cool for at least an hour before slicing and serving.