In a small saucepan brown the butter, cook it over low-medium heat for a few minutes stirring frequently.

Brown the Butter 

In a large mixing bowl add the bananas and use a potato masher or fork to mash bananas

Mash the Bananas

Pour the mashed bananas to the warm brown butter and add the sour cream. Let it all sit for a couple of minutes then mix to combine.

Add Bananas and Sour Cream

Add the sugars, eggs and vanilla extract and whisk to fully combine.

Add Sugars and Eggs

Step 4

Gently fold in the flour, baking soda, and salt to the wet ingredients. Stir dry ingredients just to combine.

Add the Dry to the Wet Ingredients 

Step 5

Pour into prepared pan. Sprinkle optional brown sugar topping.

Pour and Bake

Step 6