banana bread brownies

Ingredients For banana bread brownies

• 1-1/2 c

  sugar
• 1 c

  sour cream
• 1/2 c

  butter, softened
• 2

  eggs
• 1-3/4 c

  (3 or 4) ripe bananas, mashed
• 2 tsp

  vanilla extract
• 2 c

  all purpose flour
• 1 tsp

  baking soda
• 3/4 tsp

  salt
• 1/2 c

  chopped walnuts (optional)
• brown butter frosting
• 1/2 c

  butter
• 4 c

  powdered sugar
• 1-1/2 tsp

  vanilla extract
• 3 Tbsp

  milk