Preheat the oven to 350°F. Butter a 9-inch metal loaf pan and line with parchment paper.
Add the butter to a small saucepan at medium heat. Stir occasionally until the butter becomes bubbly, frothy, and has browned, about 6-8 minutes.
Combine the browned butter and brown sugar in a large mixing bowl. Add the mashed bananas* see note and combine. Check to make sure that the mixture is not too warm or it will cook the eggs.
Add the eggs and vanilla extract and combine. Add the baking soda and salt and combine.
Add the flour and use a spoon to incorporate the flour by hand. Add the chocolate chips and gently combine.
Pour the banana bread batter into the prepared loaf pan. Top with additional chocolate chips if desired.
Bake at 350°F for 50-55 minutes.A toothpick inserted in the middle should come out clean or with a few moist crumbs. This may take a couple tries since you’re likely to hit chocolate along the way making it tricker to see if the batter is fully cooked.
Notes
Measuring Bananas: To mash the bananas, add the bananas in chunks to a 4-cup measuring cup. Mash the bananas with the back of a fork or with a hand mixer. Scrape down the sides of the measuring cup and ensure that the total amount is equal to 2 cups.Overripe Bananas: Overripe bananas have a stronger banana flavor, but they are not sweeter. Choose ripe or overripe bananas - see my Banana Bread Tips. You do not need to use brown bananas, and in fact I find that they can be overpowering in flavor.Ceramic Loaf Pan: A 9-inch ceramic loaf pan will have a very similar baking time to a metal loaf pan. Just monitor the banana bread for the last 5 or so minutes and adjust the time as needed.