I can’t get over how these Banana Bread Brownies turn out so moist, tender, and rich, with sweet banana flavor, crunchy walnuts, and a creamy vanilla frosting that makes every square irresistible.

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I’m obsessed with these Banana Bread Brownies because they hit that sweet spot between fudgy, cakey, and straight-up addictive. I get the deep brownie vibe I crave, but with the soft banana bread texture that keeps every bite tender instead of dry.

The ripe bananas bring bold flavor without tasting fake, and sour cream makes the crumb ridiculously moist. But the frosting?

That creamy vanilla layer is where I lose all self-control. I love a dessert that feels familiar but still a little extra.

Rich, soft, messy in the best way. And yes, I will absolutely cut myself a corner piece first.

Ingredients

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All-purpose flour gives the brownies structure without making them feel too cakey.
Cocoa powder brings that deep chocolate vibe, because banana needs a buddy.
Baking soda helps everything puff up just enough.
Salt keeps the sweetness from going totally overboard.
Melted butter makes the crumb rich, soft, and a little fudgy.
Brown sugar adds cozy moisture and a caramel-ish background flavor.
Granulated sugar gives sweetness and those slightly chewy brownie edges.
Eggs hold it together and add a little richness.
Vanilla makes the chocolate and banana taste more rounded.
Sour cream keeps things tender, moist, and honestly kind of bakery-style.
Mashed bananas bring natural sweetness, comfort, and that classic banana bread smell.
Walnuts add crunch, nuttiness, and a little grown-up energy.
Plus, cinnamon adds warmth if you like that cozy bakery feel.
Cream cheese frosting makes the top tangy, sweet, and totally snackable.
Basically, milk or cream loosens the frosting so it spreads like a dream.

Ingredient Quantities

1 cup (125 g) all purpose flour

1/2 cup (50 g) unsweetened cocoa powder

1 teaspoon baking soda

1/2 teaspoon salt

1/2 cup (113 g) unsalted butter, melted and slightly cooled

3/4 cup (150 g) packed light brown sugar

1/4 cup (50 g) granulated sugar

2 large eggs, room temperature

1 teaspoon vanilla extract

1/2 cup sour cream

2 ripe bananas, mashed (about 1 cup)

1/2 cup chopped walnuts, toasted if desired

Optional pinch of ground cinnamon

For the vanilla frosting: 4 ounces (115 g) cream cheese, softened

For the vanilla frosting: 2 tablespoons (28 g) unsalted butter, softened

For the vanilla frosting: 1 1/2 to 2 cups (180 to 240 g) powdered sugar, sifted

For the vanilla frosting: 1 teaspoon vanilla extract

For the vanilla frosting: 1 to 2 tablespoons milk or cream, to reach spreading consistency

Pinch of salt for the frosting

How to Make this

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1. Preheat oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper or lightly grease and set aside.

2. Whisk together 1 cup all purpose flour, 1/2 cup unsweetened cocoa powder, 1 teaspoon baking soda, 1/2 teaspoon salt and an optional pinch of ground cinnamon in a bowl; set dry mixture aside.

3. In a large bowl, combine 1/2 cup melted and slightly cooled unsalted butter, 3/4 cup packed light brown sugar and 1/4 cup granulated sugar; whisk until smooth and slightly glossy.

4. Add 2 large room temperature eggs one at a time, mixing well after each, then stir in 1 teaspoon vanilla extract and 1/2 cup sour cream until fully incorporated.

5. Fold in 2 ripe mashed bananas (about 1 cup) to the wet mixture.

6. Gently fold the dry ingredients into the wet mixture until just combined; avoid overmixing. Stir in 1/2 cup chopped walnuts, toasted if desired.

7. Pour the batter into the prepared pan, smooth the top, and bake 25 to 30 minutes or until a toothpick inserted near the center comes out with a few moist crumbs but not wet batter. Cool completely in the pan on a wire rack.

8. Meanwhile make the vanilla frosting by beating 4 ounces softened cream cheese and 2 tablespoons softened unsalted butter until smooth. Add 1 teaspoon vanilla extract and a pinch of salt. Gradually add 1 1/2 to 2 cups sifted powdered sugar and beat until smooth, adding 1 to 2 tablespoons milk or cream as needed to reach a spreadable consistency.

9. Once the brownies are completely cool, spread the vanilla frosting evenly over the top. Garnish with extra chopped walnuts if desired.

10. Chill briefly to set the frosting if you like, then slice into squares and serve.

Equipment Needed

1. 8×8 inch baking pan lined with parchment paper or lightly greased
2. Mixing bowls, medium and large
3. Measuring cups and spoons
4. Whisk for dry ingredients and sugar mixture
5. Rubber or silicone spatula for folding and spreading batter
6. Hand mixer or stand mixer for frosting (or a sturdy wooden spoon)
7. Fork or potato masher for mashing bananas
8. Wire cooling rack
9. Toothpick or cake tester for checking doneness

FAQ

Q: Can I use overripe bananas and how ripe should they be? A: Yes, very ripe bananas with brown spots are ideal because they are sweeter and mash easily; about 1 cup mashed from 2 medium bananas is perfect.

Q: Can I omit or replace the sour cream? A: Yes. Substitute plain yogurt or an equal amount of buttermilk for similar moisture and tang, or use an egg yolk plus a tablespoon of milk if you need a dairy-free option.

Q: How should I store the banana bread brownies and how long do they keep? A: Store in an airtight container at room temperature for up to 3 days, or refrigerate for up to 7 days. Frosted brownies last longer refrigerated; bring to room temperature before serving for best texture.

Q: Can I freeze the brownies or the frosting? A: Yes. Freeze unfrosted brownies wrapped tightly for up to 3 months. Cool and thaw overnight in the refrigerator before frosting. Cream cheese frosting can be frozen in an airtight container for up to 2 months and thawed in the fridge.

Q: Can I skip the walnuts or use other mix ins? A: Absolutely. Omit nuts for nut free brownies or swap for chocolate chips, pecans, or dried fruit to taste. Fold them in gently to avoid overmixing the batter.

Q: Any tips for a smooth, spreadable cream cheese frosting? A: Beat softened cream cheese and butter until very smooth before adding powdered sugar in batches. Adjust thickness with a tablespoon at a time of milk or cream and add a pinch of salt to balance sweetness.

Banana Bread Brownies: A Decadent Twist On Classic Comfort Recipe Substitutions and Variations

All purpose flour: substitute 1:1 with whole wheat pastry flour for nuttier flavor and slightly denser crumb; or use 1 cup plus 2 tablespoons gluten free all purpose blend (with xanthan gum) for a gluten free option; or replace up to 1/3 of the flour with oat flour (finely ground oats) for extra tenderness.
Unsalted butter: swap equal amount with melted coconut oil for a hint of tropical flavor and dairy free baked good; or use neutral flavored vegetable oil (canola or sunflower) in same volume for moistness; or use melted ghee for richer, slightly caramel notes.
Sour cream: replace with plain Greek yogurt (full fat) in equal measure for similar tang and texture; or use buttermilk, reduced by 2 tablespoons to maintain batter thickness; or use dairy free yogurt for a non dairy alternative.
Cream cheese (for frosting): substitute with an equal amount of mascarpone for a silkier, less tangy frosting; or use softened vegan cream cheese for dairy free frosting; or swap half the cream cheese with unsalted butter to loosen texture and increase spreadability.

Pro Tips

1. Use very ripe bananas for maximum sweetness and moisture; they mash easily and blend into the batter without needing extra sugar.
2. Let the melted butter cool slightly and use room temperature eggs so the batter stays smooth and the texture stays tender.
3. Fold the dry ingredients in gently and stop as soon as streaks disappear; overmixing develops gluten and makes the brownies cakier than you want.
4. Cool the brownies completely before frosting, then chill briefly after frosting to help clean slices. Toasted walnuts add more crunch and deeper flavor if you have a minute to brown them in a dry skillet.

Banana Bread Brownies: A Decadent Twist On Classic Comfort Recipe

Recipe by Toni Baldesera

0.0 from 0 votes

I can’t get over how these Banana Bread Brownies turn out so moist, tender, and rich, with sweet banana flavor, crunchy walnuts, and a creamy vanilla frosting that makes every square irresistible.

Servings

servings

Calories

372

kcal

Equipment: 1. 8×8 inch baking pan lined with parchment paper or lightly greased
2. Mixing bowls, medium and large
3. Measuring cups and spoons
4. Whisk for dry ingredients and sugar mixture
5. Rubber or silicone spatula for folding and spreading batter
6. Hand mixer or stand mixer for frosting (or a sturdy wooden spoon)
7. Fork or potato masher for mashing bananas
8. Wire cooling rack
9. Toothpick or cake tester for checking doneness

Ingredients

1 cup (125 g) all purpose flour
1/2 cup (50 g) unsweetened cocoa powder
1 teaspoon baking soda
1/2 teaspoon salt
1/2 cup (113 g) unsalted butter, melted and slightly cooled
3/4 cup (150 g) packed light brown sugar
1/4 cup (50 g) granulated sugar
2 large eggs, room temperature
1 teaspoon vanilla extract
1/2 cup sour cream
2 ripe bananas, mashed (about 1 cup)
1/2 cup chopped walnuts, toasted if desired
Optional pinch of ground cinnamon
For the vanilla frosting: 4 ounces (115 g) cream cheese, softened
For the vanilla frosting: 2 tablespoons (28 g) unsalted butter, softened
For the vanilla frosting: 1 1/2 to 2 cups (180 to 240 g) powdered sugar, sifted
For the vanilla frosting: 1 teaspoon vanilla extract
For the vanilla frosting: 1 to 2 tablespoons milk or cream, to reach spreading consistency
Pinch of salt for the frosting

Directions

Preheat oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper or lightly grease and set aside.
Whisk together 1 cup all purpose flour, 1/2 cup unsweetened cocoa powder, 1 teaspoon baking soda, 1/2 teaspoon salt and an optional pinch of ground cinnamon in a bowl; set dry mixture aside.
In a large bowl, combine 1/2 cup melted and slightly cooled unsalted butter, 3/4 cup packed light brown sugar and 1/4 cup granulated sugar; whisk until smooth and slightly glossy.
Add 2 large room temperature eggs one at a time, mixing well after each, then stir in 1 teaspoon vanilla extract and 1/2 cup sour cream until fully incorporated.
Fold in 2 ripe mashed bananas (about 1 cup) to the wet mixture.
Gently fold the dry ingredients into the wet mixture until just combined; avoid overmixing. Stir in 1/2 cup chopped walnuts, toasted if desired.
Pour the batter into the prepared pan, smooth the top, and bake 25 to 30 minutes or until a toothpick inserted near the center comes out with a few moist crumbs but not wet batter. Cool completely in the pan on a wire rack.
Meanwhile make the vanilla frosting by beating 4 ounces softened cream cheese and 2 tablespoons softened unsalted butter until smooth. Add 1 teaspoon vanilla extract and a pinch of salt. Gradually add 1 1/2 to 2 cups sifted powdered sugar and beat until smooth, adding 1 to 2 tablespoons milk or cream as needed to reach a spreadable consistency.
Once the brownies are completely cool, spread the vanilla frosting evenly over the top. Garnish with extra chopped walnuts if desired.
Chill briefly to set the frosting if you like, then slice into squares and serve.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.