These Banana Bread Brownies with brown butter frosting are the perfect treat for any occasion! Rich, moist, and irresistibly delicious, they combine the classic flavors of banana bread with the delightful texture of brownies. Whether it’s a cozy family gathering or a potluck, these brownies will surely impress everyone. With simple ingredients and an easy-to-follow recipe, you’ll want to make them again and again!

Jump to:
- Why You’ll Love This Recipe
- Tools and Preparation
- Essential Tools and Equipment
- Importance of Each Tool
- Ingredients
- For the Brownies
- For the Frosting
- How to Make Banana Bread Brownies
- Step 1: Preheat the Oven
- Step 2: Prepare the Brownie Batter
- Step 3: Combine Dry Ingredients
- Step 4: Bake the Brownies
- Step 5: Make the Frosting
- Step 6: Frost Your Brownies
- How to Serve Banana Bread Brownies
- A La Mode
- With Fresh Berries
- Drizzled with Caramel Sauce
- Topped with Whipped Cream
- Chocolate Ganache
- How to Perfect Banana Bread Brownies
- Best Side Dishes for Banana Bread Brownies
- Common Mistakes to Avoid
- Storage & Reheating Instructions
- Refrigerator Storage
- Freezing Banana Bread Brownies
- Reheating Banana Bread Brownies
- Frequently Asked Questions
- What Makes These Banana Bread Brownies Special?
- Can I Customize My Banana Bread Brownies?
- How Do I Store Leftover Banana Bread Brownies?
- Can I Use Other Nuts Instead of Walnuts?
- Are Banana Bread Brownies Healthy?
- Final Thoughts
- 📖 Recipe Card
Why You’ll Love This Recipe
- Irresistible Flavor: The combination of ripe bananas and brown butter frosting creates a unique taste that is both comforting and indulgent.
- Easy to Make: With straightforward steps and common ingredients, this recipe is perfect for bakers of all skill levels.
- Perfect for Any Occasion: Whether it’s a birthday celebration or just a dessert for the week, these brownies fit right in.
- Versatile Treat: Serve them warm with ice cream or enjoy them on their own; they’re delicious either way!
- Nutty Crunch: Chopped walnuts add a delightful crunch that complements the softness of the brownie perfectly.
Tools and Preparation
Gathering the right tools makes baking easier and more enjoyable. With these essentials, you’ll be well-equipped to create your banana bread brownies.
Essential Tools and Equipment
- Mixing bowls
- Electric mixer
- Rubber spatula
- Measuring cups and spoons
- 9×13-inch baking pan
Importance of Each Tool
- Mixing bowls: Essential for combining ingredients evenly without mess.
- Electric mixer: Saves time and effort when creaming butter and sugar together.
- Rubber spatula: Helps scrape down the sides of the bowl to ensure no ingredients are left behind.
- Baking pan: A proper size ensures even cooking and easy serving.

Ingredients
For these delicious banana bread brownies, gather the following ingredients:
For the Brownies
- 1 1/2 cups granulated sugar
- 1 cup sour cream
- 1/2 cup butter, softened
- 2 large eggs
- 3-4 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 Frosting
- 1/4 cup butter
- 3-4 cups powdered sugar
- 1 1/2 teaspoons vanilla extract
- 2-3 tablespoons milk
How to Make Banana Bread Brownies
Step 1: Preheat the Oven
Preheat your oven to 375 degrees Fahrenheit. Grease and line a 9×13-inch pan with cooking spray and parchment paper, leaving an overhang on the sides. This helps with easy removal after baking.
Step 2: Prepare the Brownie Batter
In a large mixing bowl:
1. Beat together granulated sugar, sour cream, softened butter, and eggs until creamy.
2. Mix in the mashed bananas and vanilla extract until fully incorporated.
Step 3: Combine Dry Ingredients
Sift in:
1. All-purpose flour,
2. baking soda,
3. salt.
Gently mix with a rubber spatula until well combined, then fold in the chopped walnuts.
Step 4: Bake the Brownies
Spread the batter evenly into your prepared pan. Bake for 30–35 minutes or until golden brown on top. Allow cooling in the pan for about 10 minutes before frosting.
Step 5: Make the Frosting
While brownies are cooling:
1. Heat the butter in a large pan over medium heat until it boils and turns brown; stir frequently to prevent burning.
2. Remove from heat and transfer to a mixing bowl.
Step 6: Frost Your Brownies
To your browned butter, add half of the powdered sugar along with remaining ingredients:
1. Add in vanilla extract,
2. Add enough milk to reach desired consistency,
3. Whisk until smooth; adjust sweetness by adding more powdered sugar if needed.
Spread the frosting over warm banana bread brownies before slicing into squares. Enjoy your delicious creation!
How to Serve Banana Bread Brownies
Banana bread brownies are a delightful treat that can be enjoyed in various ways. Here are some serving suggestions to elevate your dessert experience.
A La Mode
- Serve warm banana bread brownies with a scoop of vanilla ice cream on top for a delicious contrast of flavors and temperatures.
With Fresh Berries
- Add a side of fresh strawberries or blueberries to enhance the sweetness and add a touch of freshness to your dessert plate.
Drizzled with Caramel Sauce
- A drizzle of caramel sauce over the brownies adds an extra layer of sweetness and richness that complements the banana flavor perfectly.
Topped with Whipped Cream
- Lightly dollop whipped cream on top for a fluffy texture that balances the dense brownie base.
Chocolate Ganache
- Pour a warm chocolate ganache over the brownies for a chocolate lover’s dream, intensifying the dessert’s indulgence.
How to Perfect Banana Bread Brownies
Creating perfect banana bread brownies is easier than you think. Follow these tips for the best results.
- Use Ripe Bananas: The riper the bananas, the sweeter and more flavorful your brownies will be. Look for bananas with brown spots.
- Don’t Overmix: Mix just until combined to keep your brownies tender and prevent them from becoming tough.
- Check for Doneness: Use a toothpick to check if the brownies are done. A few moist crumbs should stick, but no wet batter.
- Cool Before Frosting: Allow cooling for at least 10 minutes before adding frosting. This prevents melting and ensures even coverage.
- Store Properly: Keep leftovers in an airtight container at room temperature for up to three days or in the fridge for up to a week.
Best Side Dishes for Banana Bread Brownies
Pairing side dishes with banana bread brownies can create a more rounded dessert experience. Here are some tasty options.
Vanilla Ice Cream
A classic pairing that adds creamy richness to each bite of brownie, enhancing its flavor profile.Fresh Fruit Salad
A light and refreshing option that balances out the density of the brownies while adding natural sweetness.Chocolate Milkshake
Indulge in a thick chocolate milkshake that perfectly complements the flavors of banana bread brownies.Espresso or Coffee
The bold flavors of coffee provide an excellent counterpoint to the sweetness of the brownies, making it a delightful combination.Nutty Granola
Serving granola on the side adds crunch and texture while also introducing healthy elements alongside your dessert.Coconut Whipped Cream
For a dairy-free option, coconut whipped cream offers tropical notes that pair wonderfully with banana flavors.
Common Mistakes to Avoid
When making Banana Bread Brownies, even small mistakes can affect the outcome. Here are some common pitfalls to watch out for.
- Not Using Ripe Bananas: Ripe bananas are essential for sweetness and moisture. Ensure your bananas have brown spots for the best flavor.
- Overmixing the Batter: Overmixing can lead to dense brownies. Mix just until combined for a lighter texture.
- Skipping the Cooling Time: Allowing the brownies to cool before frosting is crucial. This prevents the frosting from melting and ensures a beautiful finish.
- Incorrect Oven Temperature: An oven that’s too hot can burn the edges while leaving the center raw. Always preheat and use an oven thermometer if needed.
- Ignoring Ingredient Temperature: Cold eggs or butter can affect the batter’s consistency. Let them sit at room temperature before mixing.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 5 days.
- Place parchment paper between layers to prevent sticking.
Freezing Banana Bread Brownies
- Wrap tightly in plastic wrap and then in aluminum foil.
- Freeze for up to 3 months for best quality.
Reheating Banana Bread Brownies
- Oven: Preheat to 350°F (175°C) and warm for about 10 minutes.
- Microwave: Heat individual pieces on a microwave-safe plate for 15-20 seconds.
- Stovetop: Use a skillet over low heat, cover, and warm gently for about 5 minutes.
Frequently Asked Questions
What Makes These Banana Bread Brownies Special?
These Banana Bread Brownies combine the classic flavors of banana bread with a fudgy brownie texture, making them uniquely delicious.
Can I Customize My Banana Bread Brownies?
Absolutely! You can add chocolate chips, different nuts, or spices like cinnamon to enhance the flavor.
How Do I Store Leftover Banana Bread Brownies?
Store leftovers in an airtight container in the refrigerator for up to 5 days or freeze them for longer storage.
Can I Use Other Nuts Instead of Walnuts?
Yes! Feel free to substitute walnuts with pecans or almonds depending on your preference.
Are Banana Bread Brownies Healthy?
While they do contain sugar and butter, using ripe bananas adds natural sweetness and moisture, making them a better choice than many other dessert options.
Final Thoughts
Banana Bread Brownies are not only delightful but also versatile. Their rich flavor profile makes them perfect as a dessert or snack. Feel free to customize them with your favorite ingredients such as nuts or chocolate chips for an even more personal touch!
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📖 Recipe Card
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Banana Bread Brownies
- Total Time: 50 minutes
- Yield: Approximately 12 servings 1x
Description
Indulge in the delightful fusion of classic banana bread and rich brownies with these Banana Bread Brownies topped with a luscious brown butter frosting. Each bite offers a moist, fudgy texture enriched by ripe bananas and a hint of nuttiness from chopped walnuts. Perfect for any occasion, these brownies are an easy-to-make treat that will impress family and friends alike. Whether served warm with a scoop of ice cream or enjoyed on their own, these brownies are sure to satisfy your sweet cravings!
Ingredients
- 1 1/2 cups granulated sugar
- 1 cup sour cream
- 1/2 cup softened butter
- 2 large eggs
- 3–4 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
- 1/4 cup butter (for frosting)
- 3–4 cups powdered sugar (for frosting)
- 1 1/2 teaspoons vanilla extract (for frosting)
- 2–3 tablespoons milk (for frosting)
Instructions
- Preheat your oven to 375°F (190°C). Grease and line a 9×13-inch baking pan with parchment paper.
- In a large mixing bowl, beat together granulated sugar, sour cream, softened butter, and eggs until creamy. Stir in mashed bananas and vanilla extract.
- Sift in all-purpose flour, baking soda, and salt. Gently combine with a rubber spatula and fold in chopped walnuts.
- Spread the batter evenly in the prepared pan and bake for 30–35 minutes or until golden brown. Cool for about 10 minutes before frosting.
- For the frosting, heat butter in a pan until browned; then mix with powdered sugar, vanilla extract, and enough milk to reach desired consistency. Frost the cooled brownies.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 brownie (60g)
- Calories: 250
- Sugar: 22g
- Sodium: 150mg
- Fat: 9g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 35mg





