Banana Nut Brownies

Brownie Batter:
1 1/2 cup sugar
1cup sour cream
1/2 cup butter, softened
2 eggs
3 ripe bananas, mashed
2 tsp vanilla extract
2 cup all purpose flour
1tsp baking soda
3/4 tsp salt
1 cup chopped walnuts

Browned Butter Frosting:
1/4 cup butter
1/4 cup light brown sugar
3 tbsp milk
1 1/2 tsp vanilla extract
2 cups confectioner's sugar

1. Heat oven to 375F. Line a 15x10 inch cookie sheet (jelly roll pan) with parchment paper, or grease and flour, set aside. In a large bowl, beat together sugar, sour cream, butter, and eggs until creamy. Blend in bananas and vanilla extract.

2. In separate bowl, add flour, baking soda, salt, and whisk (or sift) together. Add this to the banana mixture in two parts. Stir in walnuts. Spread batter evenly into pan and bake 20 to 25 minutes or until golden brown.

3. Prepare the frosting as the brownies bake by heating butter in a large saucepan over medium heat. Add the brown sugar to the melted butter and bring to a boil, stirring continuously for about 2 minutes. Remove from heat immediately.

4. Add powdered sugar, vanilla extract and milk. Whisk together until smooth (note: it will be thinner than frosting). Using a spatula, spread the brown butter frosting over bars. This is best done when both ingredients are warm. Serve warm, room temperature or even cold!

Source: http://www.iheartnaptime.net/banana-nut-brownies/