Preheat oven to 350℉ and spray an 8-inch loaf pan with nonstick baking spray.
In a medium saucepan over high heat, melt the butter.
Once butter is melted, lower heat to medium and swirl the butter around in the pan rather than stirring it. Continue swirling the butter for a few minutes over the heat until it starts to turn brown in color. Remove the pan from the heat and let cool. In a large bowl, combine flour, brown sugar, baking powder, baking soda and salt.
In a medium bowl, whisk the eggs then add mashed bananas, vanilla and cooled butter.
Add egg mixture to dry ingredients and mix until just combined. Pour batter into prepared loaf pan.
Bake for 60-70 minutes, or until an inserted toothpick comes out clean.
Notes
This bread does freeze extremely well. We recommend placing slices or muffins in an individual snack bag, and removing them from the fridge when needed.