If you love banana bread and soft dessert bars, these Banana Bread Brownies are the perfect sweet treat. This recipe combines the rich flavor of classic banana bread with the soft, buttery texture of blondies, creating an indulgent dessert that melts in your mouth.
These bars are incredibly moist thanks to ripe bananas and sour cream, while the buttery frosting adds the perfect sweet finish. The texture sits somewhere between a fluffy cake and a chewy brownie, making every bite satisfying and comforting.
One of the best things about this recipe is how easy it is to make. Everything comes together in just one bowl, making cleanup simple and the process beginner-friendly. It’s also the perfect way to use up overripe bananas sitting on your kitchen counter.
Why You’ll Love This Recipe
- Perfect mashup of banana bread and soft blondies.
- Great way to use up overripe bananas.
- Easy one-bowl recipe with minimal cleanup.
- Soft, moist texture with rich banana flavor.
- Perfect for dessert, snacks, or coffee breaks.
Ingredients Needed
For the Banana Bread Brownies
- 1 cup granulated sugar
- 1 cup sour cream or Greek yogurt
- ½ cup unsalted butter, softened
- 2 large eggs
- 4 ripe bananas, mashed
- 2 teaspoons vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon baking soda
- ¾ teaspoon salt
- ½ cup chopped walnuts (optional)
For the Frosting
- ½ cup unsalted butter
- 4 cups powdered sugar
- 1½ teaspoons vanilla extract
- 3 tablespoons milk
Ingredient Notes
Ripe bananas
Very ripe bananas provide natural sweetness and moisture.
Sour cream
This adds richness and keeps the brownies tender.
Butter
Creates a soft, buttery crumb.
Walnuts
Optional but add a wonderful crunchy contrast.
Ingredient Substitutions
- Use Greek yogurt instead of sour cream.
- Swap walnuts for pecans or chocolate chips.
- Replace butter with coconut oil for a different flavor.
- Use brown sugar instead of white sugar for deeper caramel notes.
How to Make Banana Bread Brownies
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking pan or line it with parchment paper.
Step 2: Mash the Bananas
In a large bowl, mash the ripe bananas until smooth with minimal lumps.
Step 3: Mix Wet Ingredients
Add the butter, sugar, eggs, sour cream, and vanilla extract to the bananas. Whisk until smooth and well combined.
Step 4: Combine Dry Ingredients
In another bowl, whisk together flour, baking soda, and salt.
Step 5: Combine Batter
Gradually fold the dry ingredients into the wet mixture until just combined. Avoid overmixing.
Step 6: Add Optional Mix-ins
Stir in chopped walnuts or chocolate chips if desired.
Step 7: Bake
Spread the batter evenly into the prepared pan.
Bake for 25–30 minutes until a toothpick inserted in the center comes out clean.
Step 8: Cool and Frost
Allow the brownies to cool completely before spreading the frosting.
Pro Tips for Perfect Results
- Use very ripe bananas for maximum flavor.
- Do not overmix the batter to keep the brownies soft.
- Line the pan with parchment for easy removal.
- Let the brownies cool completely before frosting.
Common Mistakes to Avoid
- Using underripe bananas with less sweetness.
- Overmixing the batter which can make brownies dense.
- Baking too long which dries the brownies.
- Frosting while still warm causing melting.
Serving Suggestions + Variations
Serve these banana bread brownies with:
- Coffee or latte
- Vanilla ice cream
- Fresh berries
- Caramel drizzle
Easy variations:
- Chocolate chip version
Add ½ cup chocolate chips to the batter. - Nutty banana bars
Use walnuts or pecans for crunch. - Peanut butter swirl
Add a peanut butter swirl before baking.
Make Ahead & Storage Tips
- Store at room temperature for up to 3 days.
- Refrigerate for up to 1 week.
- Freeze slices for up to 3 months.
- Wrap individually for quick snacks.
Frequently Asked Question
Can I freeze banana bread brownies?
Yes. Wrap slices tightly and freeze for up to 3 months.
Can I make them without frosting?
Absolutely. They taste delicious plain as well.
Can I use frozen bananas?
Yes. Just thaw and drain excess liquid.
Can I make them gluten free?
Use a 1:1 gluten-free baking flour.
Why This Recipe Works
- Bananas provide natural moisture and sweetness.
- Sour cream keeps the crumb soft and tender.
- Balanced sugar and butter create a rich flavor.
- The frosting adds a creamy contrast to the soft bars.
Conclusion
Banana Bread Brownies are the perfect dessert when you want something soft, rich, and comforting. They combine the beloved flavor of banana bread with the indulgent texture of brownies, making them a guaranteed crowd favorite.
Whether you bake them for family gatherings, lunchbox treats, or weekend desserts, these banana bars deliver big flavor with minimal effort.
Print
Banana Bread Brownies
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
Description
Banana bread brownies are soft banana bars that combine moist banana bread flavor with the buttery texture of blondies and creamy frosting.
Ingredients
1 cup granulated sugar
1 cup sour cream
1/2 cup unsalted butter softened
2 large 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 optional
1/2 cup unsalted butter
4 cups powdered sugar
1 1/2 teaspoons vanilla extract
3 tablespoons milk
Instructions
Prepare the Pan
Preheat oven to 350°F (175°C).
Grease and flour a 9×13-inch baking dish or line with parchment paper.
Make the Banana Brownie Batter
In a large mixing bowl, cream together sugar, sour cream, and softened butter until light and fluffy.
Beat in eggs, mashed bananas, and vanilla extract until smooth.
In a separate bowl, whisk together flour, baking soda, and salt.
Gradually add dry ingredients to wet mixture, mixing just until combined.
Fold in walnuts, if using.
Bake
Pour batter into the prepared pan and spread evenly.
Bake for 25–30 minutes, or until a toothpick inserted in the center comes out clean.
Let cool in the pan on a wire rack.
Prepare the Frosting
In a small saucepan, melt butter over medium heat and cook until it turns a light golden brown and smells nutty (about 4–5 minutes).
Remove from heat and let cool slightly.
Whisk in powdered sugar, vanilla, and milk until smooth and spreadable.
Frost and Serve
Spread frosting over cooled brownies.
Cut into squares or bars and serve.