'Banana bread bars with brown butter frosting'

Recipe from: keyingredient.com

Ingredients for banana bread bars:

1 1/2 cup sugar

1 cup sour cream

1/2 cup butter softened

2 eggs

1 3/4 (3-4) ripe bananas, mashed

2 tsp vanilla extract

2 cups all purpose flour

1 tsp baking soda

3/4 tsp salt

1/2 cup chopped walnuts(optional) 

Ingredients for brown butter frosting:

1/2 cup butter

4 cups powdered sugar 

1 1/2 tsp vanilla extract

3 tbsp milk

Directions:

1. Heat oven to 375 F. Grease & flour 15x10 inch jelly roll pan. For the bars in a large bowl beat together sugar, sour cream, butter & eggs until creamy. Blend in bananas & vanilla extract. Add flour, baking soda, salt & blend for 1 minute. Stir in walnuts. 

2. Spread batter evenly into pan. Bake 20-25 minutes or until golden brown.

3. Meanwhile, for frosting heat butter in a large sauce pan over medium heat until boiling. Let the butter turn a delicate brown & remove from heat immediately. 

4. Add powdered sugar, vanilla extract, & milk. Whisk together until smooth( it should be thicker than a glaze but thinner than a fosting). Using a spatula, spread the brown butter frosting over the warm bars(the frosting will be easier to spread while the bars are still warm.) 

*2 dozen large bars