Step 5: Whisk the mashed bananas into the batter.
Step 6: Whisk in half of the dry ingredients until just combined. Next, whisk in the sour cream followed by the last of the flour mixture.
Step 7: Gently fold the batter with a rubber spatula to ensure all of the dry ingredients are fully combined.
Step 8: Scoop the banana bread batter into a lined 9x5 loaf pan and top with the brown butter streusel. Bake for 60 minutes.
Banana bread and streusel topping - it almost tastes like your favorite coffee cake!! Serve it up warm with a pat of butter or a scoop of vanilla ice cream for the perfect dessert if you're feeling fancy.