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Ultra-Moist Banana Bread Brownies with Brown Butter Frosting

Close-up of a moist, dark square of banana bread brownies topped with thick peanut butter-colored frosting.
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Make these ultra-moist banana bread brownies that combine rich chocolate flavor with sweet banana bread texture. Top them with a nutty brown butter frosting for a truly satisfying dessert.

Ingredients

Scale
  • 1 cup (2 sticks) unsalted butter, divided
  • 1 1/2 cups granulated sugar
  • 3 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup mashed ripe bananas (about 3 medium)
  • 1/2 cup all-purpose flour
  • 1/2 cup unsweetened cocoa powder
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1/2 cup packed light brown sugar (for frosting)
  • 2 tablespoons milk or cream (for frosting)
  • 1 1/2 cups powdered sugar (for frosting)

Instructions

  1. Preheat your oven to 350°F (175°C). Grease and line a 9×9 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. Melt 1/2 cup (1 stick) of the butter in a small saucepan over medium heat. Continue cooking, swirling often, until the butter foams, then brown bits form at the bottom and it smells nutty. Immediately remove from heat and pour into a heatproof bowl to cool slightly. This is your brown butter. Set aside 2 tablespoons of the cooled brown butter for the frosting.
  3. In a large bowl, whisk together the remaining melted butter and the granulated sugar until combined.
  4. Whisk in the eggs one at a time until incorporated. Stir in the vanilla extract and the mashed bananas.
  5. In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt.
  6. Gently fold the dry ingredients into the wet ingredients until just combined. Do not overmix.
  7. Pour the batter into the prepared baking pan and spread evenly.
  8. Bake for 25 to 30 minutes, or until a toothpick inserted near the center comes out with moist crumbs attached, not wet batter.
  9. Let the brownies cool completely in the pan on a wire rack.
  10. Prepare the frosting: In a small bowl, whisk together the reserved 2 tablespoons of cooled brown butter, the brown sugar, and the milk until smooth.
  11. Gradually whisk in the powdered sugar until the frosting is smooth and spreadable. If it is too thick, add milk 1 teaspoon at a time.
  12. Spread the brown butter frosting evenly over the cooled brownies. Cut into squares.

Notes

  • Use very ripe, spotty bananas for the best banana flavor in your brownies.
  • For a fudgier texture, slightly underbake the brownies by about 2 minutes.
  • If you prefer a different topping, consider a simple vanilla glaze instead of the brown butter frosting.
  • These brownies are excellent for meal planning and can be stored covered at room temperature for up to 3 days.

Nutrition

Find it online: https://blissbatter.com/banana-bread-brownies/