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Banana Bread Brownies

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These Banana Bread Brownies combine the best of two worlds: the rich, fudgy texture of brownies and the moist, banana flavor of classic banana bread. Topped with a brown butter frosting, they’re perfect for using up ripe bananas and indulging your sweet tooth.

Ingredients

Scale

For the Brownies:

  • 1 cup granulated sugar
  • 1/2 cup brown sugar
  • 1 cup sour cream
  • 1/2 cup unsalted butter, softened
  • 2 large eggs
  • 3 ripe bananas, mashed
  • 2 teaspoons vanilla extract
  • 2 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup chopped walnuts (optional)

For the Brown Butter Frosting:

  • 1/4 cup unsalted butter
  • 2 cups powdered sugar
  • 1 teaspoon vanilla extract
  • 23 tablespoons milk

Instructions

  • Preheat Oven and Prepare Pan:

    • Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking pan and line it with parchment paper for easy removal.
  • Make the Brownie Batter:

    • In a large bowl, beat together granulated sugar, brown sugar, sour cream, softened butter, and eggs until creamy.
    • Add in the mashed bananas and vanilla extract, mixing until combined.
    • In a separate bowl, whisk together the flour, baking soda, and salt. Gradually fold the dry ingredients into the wet ingredients until just combined. Stir in walnuts, if using.
  • Bake:

    • Spread the batter evenly in the prepared pan. Bake for 30-35 minutes, or until golden brown and a toothpick inserted into the center comes out clean. Allow to cool in the pan for 10 minutes.
  • Make the Brown Butter Frosting:

    • In a saucepan over medium heat, melt the butter until it turns golden brown and gives off a nutty aroma. Remove from heat and let cool slightly.
    • In a bowl, combine the browned butter, powdered sugar, vanilla, and milk. Whisk until smooth and spreadable.
  • Frost and Serve:

    • Spread the brown butter frosting over the cooled brownies. Slice and serve.

Notes

  • Storage: Store in an airtight container at room temperature for up to 3 days, or refrigerate for up to a week.
  • Make it Gluten-Free: Use a 1:1 gluten-free flour substitute if needed.