A delicious twist on classic banana bread, these Banana Bread Brownies with Brown Butter Frosting are rich, moist, and topped with an irresistible brown butter frosting. The nutty sweetness of the frosting perfectly complements the banana and walnut-filled base, making this dessert a standout treat for any occasion.
Why You’ll Love This Recipe
Combines the comforting flavors of banana bread with the indulgence of brownies.
Brown butter frosting adds a sophisticated, nutty sweetness that takes the brownies to the next level.
Easy to prepare with simple ingredients you likely already have at home.
Perfect for sharing—ideal for potlucks, picnics, or family gatherings.
Flexible recipe that allows for creative variations to suit your taste.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
For the Banana Bread Brownies:
1 1/2 cups sugar
1 cup sour cream
1/2 cup butter
2 eggs
4 ripe bananas, mashed
2 teaspoons vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
3/4 teaspoon salt
1/2 cup chopped walnuts
For the Brown Butter Frosting:
1/2 cup butter
4 cups powdered sugar
1 1/2 teaspoons vanilla extract
3 tablespoons milk
Directions
Preheat the oven to 375°F (190°C). Grease and flour a 15×10-inch jelly roll pan.
In a large mixing bowl, beat together the sugar, sour cream, butter, and eggs until smooth and creamy. Stir in the mashed bananas and vanilla extract.
Gradually mix in the flour, baking soda, and salt until just combined. Fold in the chopped walnuts for added texture and flavor.
Spread the batter evenly into the prepared pan and bake for 20 to 25 minutes, or until the bars are golden brown and a toothpick inserted in the center comes out clean.
While the brownies bake, prepare the brown butter frosting. Melt the butter in a saucepan over medium heat, letting it bubble and turn a delicate brown (about 3-4 minutes). Remove from heat.
Add the powdered sugar, vanilla extract, and milk to the browned butter, whisking until smooth. The frosting should have a thick but spreadable consistency.
Once the brownies are baked, let them cool slightly. While still warm, spread the frosting evenly over the top.
Servings and Timing
Servings: 18–24 brownies
Prep Time: 15 minutes
Cook Time: 25 minutes
Total Time: 40 minutes
Variations
Nut-Free Option: Omit the walnuts if you prefer or need a nut-free version.
Chocolate Twist: Add chocolate chips to the batter for an extra indulgent touch.
Gluten-Free: Substitute all-purpose flour with a gluten-free baking blend.
Tropical Flavor: Swap walnuts with shredded coconut or chopped macadamia nuts.
Spiced Brownies: Add a teaspoon of cinnamon or a pinch of nutmeg to the batter for warm, spiced undertones.
Storage/Reheating
Store the brownies in an airtight container at room temperature for up to 3 days or in the refrigerator for up to 5 days.
To freeze, wrap individual brownies tightly in plastic wrap and place in a freezer-safe bag. They’ll keep for up to 2 months. Thaw at room temperature before serving.
To reheat, warm individual brownies in the microwave for 10–15 seconds to soften the frosting slightly.
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FAQs
1Can I make these brownies without sour cream?
Yes, you can substitute sour cream with plain Greek yogurt or buttermilk for similar moisture and tang.
Why is my frosting grainy?
Grainy frosting can occur if the powdered sugar isn’t fully incorporated. Whisk vigorously, or sift the powdered sugar before adding it to the browned butter.
Can I use frozen bananas?
Absolutely. Thaw frozen bananas completely and drain any excess liquid before mashing them for the recipe.
What can I use instead of walnuts?
Chopped pecans, almonds, or even chocolate chips make great substitutes for walnuts.
How do I know when the brownies are done?
The brownies are ready when they turn golden brown and a toothpick inserted into the center comes out clean or with a few moist crumbs.
Conclusion
Banana Bread Brownies with Brown Butter Frosting are the perfect blend of comforting flavors and indulgent textures. This easy recipe is versatile and ideal for any gathering or special treat. I hope you enjoy making—and eating—these delightful brownies as much as I do!
📖 Recipe:
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Banana Bread Brownies with Brown Butter Frosting
- Total Time: 40 minutes
- Yield: 18–24 brownies
- Diet: Vegetarian
Description
Banana Bread Brownies with Brown Butter Frosting are a decadent twist on classic banana bread. These moist and flavorful brownies are studded with walnuts and topped with a rich, nutty frosting, making them the perfect treat for any occasion. Ideal for potlucks, picnics, or indulgent family desserts.
Ingredients
For the Banana Bread Brownies:
1 1/2 cups sugar
1 cup sour cream
1/2 cup butter
2 eggs
4 ripe bananas, mashed
2 teaspoons vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
3/4 teaspoon salt
1/2 cup chopped walnuts
For the Brown Butter Frosting:
1/2 cup butter
4 cups powdered sugar
1 1/2 teaspoons vanilla extract
3 tablespoons milk
Instructions
- Preheat the oven to 375°F (190°C) and prepare a 15×10-inch jelly roll pan by greasing and flouring it.
- In a large bowl, beat together sugar, sour cream, butter, and eggs until creamy.
- Stir in mashed bananas and vanilla extract.
- Gradually mix in flour, baking soda, and salt until just combined. Fold in chopped walnuts.
- Spread the batter evenly in the prepared pan and bake for 20–25 minutes, or until golden and a toothpick inserted comes out clean.
- While baking, prepare the frosting: brown the butter in a saucepan over medium heat, then whisk in powdered sugar, vanilla, and milk until smooth.
- Spread the frosting over warm brownies. Allow to cool before cutting.
Notes
Substitute walnuts with pecans, shredded coconut, or chocolate chips for variations.
Ensure the frosting is smooth by sifting the powdered sugar before mixing.
For a nut-free version, simply omit the walnuts.
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 18–24 brownies
- Calories: 270 kcal per serving
