All you need is :
4 mashed ripe bananas.
1 tbsp pure vanilla extract.
2 large eggs.
1 cup granulated sugar.
1 cup sour cream.
4 tbsp softened butter.
2 cups all-purpose flour.
1 tsp baking soda.
1 tsp salt.
For the brown butter frosting :
2 tbsp butter.
4 cup powdered sugar.
2 tsp vanilla extract.
1/3 cup milk
INSTRUCTIONS :
Step 1:
I preheated oven to 350 degrees F and spray a jelly roll pan with cooking spray.
Step 2:
I beat sugar, sour cream, butter, and eggs using an electric mixer, add mashed bananas and pure vanilla extract.
Step 3:
Then I added flour, salt, and baking soda and blend for more than 2 minutes.
Step 4:
I spread batter evenly into pan and baked for 20 to 25 minutes or until golden brown.
Step 5:
Meanwhile, I made the brown butter frosting, I heated butter in a large saucepan over medium heat until boiling.
Step 6:
Then I added powdered sugar, milk, and vanilla, whisked together until smooth, and poured it over the warm bars.
IT WAS AMAZIIIIING !
ENJOY.