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Moist Banana Bread Brownies With Brown Butter Frosting

Soft, moist Banana Bread Brownies topped with rich brown butter frosting. An easy, irresistible dessert perfect for gatherings and everyday treats.
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Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Course Dessert
Cuisine American
Servings 24 large bars
Calories 260 kcal

Ingredients
  

For the Banana Bread Bars

  • 1/2 cups sugar
  • 1 cup sour cream
  • 1/2 cup softened butter
  • 2 eggs
  • 3/4 cups mashed ripe bananas (about 3–4 bananas)
  • 2 tsp vanilla extract
  • 2 cups all-purpose flour
  • 1 tsp baking soda
  • 3/4 tsp salt
  • 1/2 cup chopped walnuts (optional)

For the Brown Butter Frosting

  • 1/2 cup butter
  • 4 cups powdered sugar
  • 1/2 cups vanilla extract
  • 3 tbsp milk

Instructions
 

  • Prep the Pan
    Preheat your oven to 375°F (190°C). Grease and flour a 15×10-inch jelly roll pan.
  • Mix the Batte
    rIn a large mixing bowl, beat together the sugar, sour cream, softened butter, and eggs until smooth and creamy.
  • Add Bananas & Dry Ingredients
    Stir in the mashed bananas and vanilla. Add the flour, baking soda, and salt, then blend for about 1 minute. Fold in walnuts if using.
  • Bake the Bars
    Spread the batter evenly in the prepared pan. Bake for 20–25 minutes, or until the top is golden and a toothpick comes out clean.
  • Prepare the Frosting
    In a saucepan, melt the butter over medium heat. Cook until it begins to turn golden brown, then remove from heat immediately.
    Whisk in the powdered sugar, vanilla, and milk until smooth and slightly
  • Frost the Bars
    Spread the warm brown butter frosting over the bars while they’re still warm. Let cool slightly before slicing into squares.

Notes

  • Choose bananas with brown spots for peak flavor.
  • Let the frosting melt slightly into the warm bars for the best texture.
  • Great recipe for using up extra bananas.