If you love the cozy flavors of banana bread but have a craving for something a bit more decadent, the Banana Bread Brownies with Brown Butter Frosting Recipe is exactly what you need. This delightful recipe takes perfectly ripe bananas and transforms them into rich, fudgy brownies topped with a luscious, nutty brown butter frosting that will make your taste buds sing. It’s the best of both worlds wrapped up in one indulgent, easy-to-make dessert that’s perfect for sharing or savoring on your own.

Banana Bread Brownies with Brown Butter Frosting Recipe - Recipe Image

Ingredients You’ll Need

The magic behind the Banana Bread Brownies with Brown Butter Frosting Recipe is all in the simple yet carefully chosen ingredients. Each contributes to the incredible texture, flavor, and aroma—from the creamy sour cream to tenderize the batter, to the ripe bananas that bring natural sweetness and moisture, and of course, the walnuts adding that satisfying crunch.

1 1/2 cups sugar: Sweetens the brownies perfectly without overpowering the banana flavor.
1 cup sour cream: Adds creaminess and moisture for soft, tender brownies.
1/2 cup butter (for batter): Provides richness and helps create a buttery crumb.
2 eggs: Bind the ingredients together and give structure to the brownies.
4 ripe bananas, mashed: The star of the show, lending natural sweetness and a moist texture.
2 teaspoons vanilla extract: Enhances all the flavors with its warm aroma.
2 cups all-purpose flour: Gives the brownies their body and structure.
1 teaspoon baking soda: Helps the brownies rise gently without becoming cakey.
3/4 teaspoon salt: Balances sweetness and brings out the nuances in flavor.
1/2 cup chopped walnuts: Adds delightful crunch and a toasted nuttiness.
1/2 cup butter (for frosting): Browned to create a deep, nutty base for the frosting.
4 cups powdered sugar: Sweetens and thickens the frosting beautifully.
1 1/2 teaspoons vanilla extract (for frosting): Adds complexity to the frosting’s flavor.
3 tablespoons milk: Used to adjust frosting consistency to silky perfection.

How to Make Banana Bread Brownies with Brown Butter Frosting Recipe

Step 1: Prepare Your Pan and Oven

Start by preheating your oven to 375°F (190°C). Grease and flour a 15×10-inch jelly roll pan to ensure your brownies release easily after baking. This step may feel simple but is key to getting a clean cut and perfect presentation.

Step 2: Mix the Wet Ingredients

Grab a large bowl and beat together the sugar, sour cream, butter, and eggs until the mixture turns creamy. This combination creates the rich, moist base that makes these brownies so special compared to your everyday banana bread.

Step 3: Add Bananas and Vanilla

Fold in the mashed ripe bananas and vanilla extract gently. The bananas bring that unmistakable natural sweetness and moisture, while the vanilla deepens the overall flavor profile for something truly comforting.

Step 4: Incorporate the Dry Ingredients and Walnuts

Gradually mix in the flour, baking soda, and salt just until combined—overmixing can make brownies tough. Lastly, fold in chopped walnuts for that lovely crunch that complements the soft banana crumb perfectly.

Step 5: Bake to Golden Perfection

Spread the batter evenly in your prepared pan and pop it in the oven. Bake for 20 to 25 minutes until the top is golden and a toothpick inserted comes out clean. The aroma pouring from your oven at this stage is pure heaven and a sure sign that deliciousness is on its way.

Step 6: Make the Brown Butter Frosting

While the brownies bake, melt butter in a saucepan over medium heat. Keep a close eye as you swirl it around—the butter will foam, then turn golden brown releasing a warm, nutty aroma. Remove from heat and whisk in powdered sugar, vanilla, and milk until smooth and spreadable.

Step 7: Frost and Cool

Spread the brown butter frosting generously over your warm brownies. Allow the frosting to set by letting the brownies cool completely before cutting into squares. This frosting adds a richness and depth that takes the Banana Bread Brownies with Brown Butter Frosting Recipe to the next level of irresistible.

How to Serve Banana Bread Brownies with Brown Butter Frosting Recipe

Garnishes

A simple sprinkle of chopped walnuts or a dusting of cinnamon on top reflects the flavors inside and adds a little extra visual appeal. For a fresh contrast, a few thin banana slices or a drizzle of melted dark chocolate can make the presentation feel extra special.

Side Dishes

These banana bread brownies pair wonderfully with a scoop of vanilla ice cream or a dollop of whipped cream. For a touch of freshness, some sliced strawberries or a handful of fresh berries brighten each bite with a burst of tartness.

Creative Ways to Present

Try cutting the brownies into bite-sized squares and serving them on a platter with small forks for parties. You can also layer them with mascarpone and a berry compote to create a stunning dessert trifle. Another hit is wrapping individual brownies in parchment for gifting—everyone will ask for your Banana Bread Brownies with Brown Butter Frosting Recipe!

Make Ahead and Storage

Storing Leftovers

Keep leftovers in an airtight container at room temperature for up to 3 days. The brownies will stay moist and flavorful, with the brown butter frosting maintaining its soft, luscious texture.

Freezing

You can freeze the unfrosted banana bread brownies by wrapping them tightly in plastic wrap and placing them in a freezer bag. Freeze for up to 3 months. When ready, thaw at room temperature before frosting to maintain the best texture.

Reheating

Warm individual servings in the microwave for about 10 seconds to revive softness and bring out the buttery aroma. Avoid overheating to keep the frosting from melting entirely—it’s all about that perfect balance of warm and creamy.

FAQs

Can I use regular butter instead of brown butter in the frosting?

Yes, you can use regular melted butter, but browning the butter adds a unique nutty depth that complements the banana and walnut flavors beautifully. It’s worth the little extra step!

Are these brownies cakey or fudgy?

These banana bread brownies strike a wonderful balance between cakey and fudgy. The sour cream keeps them tender, while the bananas add moisture without weighing them down.

Can I omit the walnuts?

Absolutely! The walnuts add texture and flavor, but if you have allergies or prefer nut-free, you can simply leave them out or substitute with chocolate chips for a different twist.

How ripe should the bananas be?

The riper, the better! Look for bananas that are heavily speckled or even mostly brown on the peel. They provide the sweetest flavor and smoothest texture for this recipe.

Can I make this recipe gluten-free?

You can substitute the all-purpose flour with a gluten-free blend one-to-one, but be sure it contains xanthan gum to maintain texture. The final result should be just as delicious!

Final Thoughts

Once you try the Banana Bread Brownies with Brown Butter Frosting Recipe, it’s hard to go back to ordinary banana bread or regular brownies. This recipe brings together the best elements of both with a frosting that truly elevates it. Whether you’re baking for a family gathering or a cozy night in, these brownies will bring smiles and requests for seconds. Don’t wait—embrace this sweet, comforting treat and enjoy every bite.