Why Make This Recipe
Banana Bread Brownies bring together the best of both worlds: the moistness of banana bread and the fudgy texture of brownies. This delicious treat is perfect for using up overripe bananas, and it’s a delightful way to satisfy your sweet tooth. The mix of flavors, topped with a creamy frosting, makes these brownies a hit for family gatherings, potlucks, or a cozy night at home.
How to Make Banana Bread Brownies
Ingredients
For the Brownies:
- 1 cup (200 g) granulated sugar
- 1 cup (240 ml) sour cream (or plain Greek yogurt)
- ½ cup (113 g) unsalted butter, softened
- 2 large eggs
- 4 ripe bananas (mashed, about 2 cups)
- 2 teaspoons pure vanilla extract
- 2 cups (250 g) all-purpose flour
- 1 teaspoon baking soda
- ¾ teaspoon salt
- ½ cup (60 g) chopped walnuts (optional)
For the Frosting:
- ½ cup (113 g) unsalted butter
- 4 cups (480 g) powdered sugar
- 1½ teaspoons pure vanilla extract
- 3 tablespoons milk (more if needed for spreading)
Directions
- 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 the dry ingredients to the 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.
How to Serve Banana Bread Brownies
Serve Banana Bread Brownies at room temperature or slightly warm. They pair wonderfully with a scoop of vanilla ice cream or a dollop of whipped cream on top. Whether you’re enjoying them with friends over coffee or as a late-night snack, these brownies are sure to please.
How to Store Banana Bread Brownies
Store leftover brownies in an airtight container at room temperature for up to 3 days. For longer storage, keep them in the fridge for up to a week. You can also freeze brownies for up to 3 months. Just make sure to wrap them tightly in plastic wrap and then place them in a freezer-safe bag or container.
Tips to Make Banana Bread Brownies
- Make sure your bananas are very ripe for the best flavor.
- Don’t overmix the batter; mix just until combined for a softer texture.
- If you prefer a richer frosting, add more butter or milk to get the desired consistency.
Variation
You can swap out walnuts for other nuts like pecans or even use chocolate chips for added sweetness. Additionally, feel free to add a pinch of cinnamon for a warm spice flavor.
FAQs
1. Can I use frozen bananas in this recipe?
Yes, frozen bananas work great! Just thaw them before mashing and use as you would fresh bananas.
2. How can I make these brownies gluten-free?
You can substitute the all-purpose flour with gluten-free all-purpose flour. Make sure it contains a binding agent like xanthan gum.
3. What can I do if my brownies are too dry?
If your brownies turn out dry, they may have been overbaked. Keep an eye on the baking time and do the toothpick test. For added moisture, you can also adjust the amount of bananas you use.

Banana Bread Brownies
Ingredients
Method
- Preheat oven to 350°F (175°C). Grease and flour a 9×13-inch baking dish or line with parchment paper.
- 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 the dry ingredients to the wet mixture, mixing just until combined. Fold in walnuts if using.
- 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.
- 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.
- Spread frosting over cooled brownies. Cut into squares or bars and serve.