The smell of freshly baked brownies crept through my kitchen, igniting childhood memories of indulgent treats straight from mom’s oven. I couldn’t resist the temptation to add a twist to classic banana bread, and that’s how these irresistible Banana Bread Brownies with Brown Butter Frosting came to life. This easy banana recipe is not only beginner-friendly but also a one-bowl dessert that quickly transforms overripe bananas into a moist, satisfying treat. Imagine sinking your teeth into a chewy brownie that marries the comforting essence of banana bread with the rich taste of brownies, all topped with a luscious brown butter frosting. Perfect for sharing—or keeping all to yourself! You’ll discover just how delightful and versatile these bars can be. Ready to make your kitchen smell like bliss? Let’s dive into this deliciousness together!

Why are these brownies a must-try?
Moist, Chewy Texture: Every bite of these Banana Bread Brownies feels like a warm hug, blending the classic taste of banana bread with fudgy brownie goodness.
One-Bowl Wonder: No need for multiple mixing bowls—this easy banana recipe is simple and straightforward, making cleanup a breeze!
Decadent Frosting: The brown butter frosting adds a rich creaminess that elevates each bite, making these brownies simply irresistible.
Versatile & Fun: Feel free to swap out walnuts for chocolate chips for a sweet twist, or sprinkle cinnamon for a cozy warmth.
Crowd-Pleasing Dessert: Perfect for gatherings or cozy nights in, these brownies will have everyone begging for seconds. Pair them with cold milk or a scoop of ice cream for added delight!
You can also check out our delicious Raspberry Brownies Fudgy for another tantalizing treat!
Banana Bread Brownies Ingredients
For the Brownies
• Sugar – Sweetness and moisture; substitute with brown sugar for a deeper flavor.
• Sour Cream – Adds tenderness and moisture; Greek yogurt can be used as a substitute.
• Butter – Provides richness in both the batter and frosting; can be replaced with margarine for a dairy-free option.
• Eggs – Binds the ingredients together and adds structure; use flax eggs for a vegan version.
• Ripe Bananas – Natural sweetness and moisture; ensure bananas are very ripe for maximum flavor.
• Vanilla Extract – Enhances the overall flavor profile; use pure vanilla for the best taste.
• All-Purpose Flour – Provides structure; for gluten-free, use a gluten-free blend.
• Baking Soda – Acts as the leavening agent; ensure freshness for best results.
• Salt – Balances sweetness; essential for flavor enhancement.
• Chopped Walnuts – Optional for texture and crunch; can be swapped with chocolate chips if nut-free.
For the Brown Butter Frosting
• Powdered Sugar – Main component of the frosting; can use less for a different sweetness level.
• Milk – Helps achieve the desired frosting consistency; dairy-free milk alternatives work well.
These Banana Bread Brownies with Brown Butter Frosting come together effortlessly for a delicious dessert that satisfies any sweet tooth!
Step‑by‑Step Instructions for Banana Bread Brownies with Brown Butter Frosting
Step 1: Preheat and Prepare
Begin by preheating your oven to 375°F (190°C). While it warms up, grease a 15×10-inch jelly roll pan with butter or cooking spray. This will ensure your Banana Bread Brownies release easily after baking and have a nice golden crust.
Step 2: Mix the Wet Ingredients
In a large mixing bowl, combine the sugar, sour cream, melted butter, and eggs. Using an electric mixer, beat the mixture on medium speed until it’s creamy and well-combined, which should take about 2-3 minutes. The mixture should appear smooth, without lumps.
Step 3: Incorporate the Bananas and Vanilla
Add the mashed ripe bananas and vanilla extract to the creamy mixture. Mix until fully incorporated, allowing the sweet aroma of the bananas to fill your kitchen. This step ensures your Banana Bread Brownies will be moist and flavorful.
Step 4: Add the Dry Ingredients
Sift in the all-purpose flour, baking soda, and salt directly into the banana batter. Gently fold them together using a spatula or wooden spoon until just combined. Be careful not to overmix, as this could lead to dense brownies. You may also add chopped walnuts at this stage if desired.
Step 5: Pour and Bake
Pour the brownie batter into the prepared jelly roll pan and spread it evenly using a spatula. Place the pan in the preheated oven and bake for 20-25 minutes. You’ll know they’re done when the edges are golden, and a toothpick inserted into the center comes out mostly clean.
Step 6: Make the Brown Butter Frosting
While the brownies are baking, prepare the brown butter frosting. In a saucepan over medium heat, melt the butter, swirling it occasionally, until it turns a golden brown and smells nutty—about 5-7 minutes. Be careful not to burn it, as you want that rich flavor.
Step 7: Whisk Together the Frosting
Remove the saucepan from the heat and whisk in the powdered sugar, vanilla extract, and milk until the frosting is smooth and creamy. If it’s too thick, add a little more milk until you reach your desired consistency. This luscious frosting will beautifully top your brownies.
Step 8: Frost the Brownies
Once the brownies have baked, remove them from the oven and while they are still warm, pour the brown butter frosting over them. Use a spatula to spread it evenly so that it melts slightly into the brownies, enhancing their moisture and flavor.
Step 9: Cool and Cut
Allow the frosted banana bread brownies to cool in the pan for at least 30 minutes before slicing. This step helps the frosting set and makes it easier to achieve clean cuts. Once cooled, cut into squares and savor the deliciousness of your homemade treat!

Banana Bread Brownies with Brown Butter Frosting Variations
Feel free to unleash your creativity and customize these delightful brownies with these fun and flavorful variations!
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Chocolate Chip Twist: Replace walnuts with chocolate chips for an extra sweet and gooey experience. The rich chocolate will balance beautifully with the bananas!
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Spiced Up: Add 1 teaspoon of cinnamon or a sprinkle of nutmeg to the batter for a warm, cozy flavor. These spices bring a lovely warmth that’s perfect for chilly evenings.
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Nut-Free Option: Swap out walnuts for sunflower seeds or omit them entirely for a completely nut-free brownie. You’ll still have a delicious texture without the crunch!
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Vegan Version: Substitute eggs with flax eggs (1 tablespoon ground flaxseed mixed with 2.5 tablespoons water) and use dairy-free butter or coconut oil in place of regular butter for a plant-based delight.
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Gluten-Free Goodness: Use a gluten-free flour blend instead of all-purpose flour to meet gluten-free needs, ensuring everyone can enjoy these moist treats!
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Frosting Fun: Experiment with the frosting by adding a dash of cocoa powder to create a chocolate brown butter frosting. You’ll love the rich, chocolatey twist!
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Fruit Flavor Burst: Mix in 1/2 cup of shredded coconut or even diced strawberries for an added fruity note that complements the bananas beautifully.
As you play with these variations, your kitchen will feel like a delightful wonderland of flavors, much like when you create other favorites like Apple Brownies Deliciously. Enjoy making these Banana Bread Brownies uniquely yours!
Make Ahead Options
These Banana Bread Brownies with Brown Butter Frosting are perfect for meal prep! You can mix the batter up to 24 hours in advance and store it in the refrigerator to keep everything fresh. Alternatively, bake the brownies and let them cool completely, then frost them and store in an airtight container for up to 3 days at room temperature. If you’re planning to serve them later, consider freezing the unfrosted brownies for up to 2 months—just layer them with parchment paper to prevent sticking. When you’re ready to indulge, simply defrost overnight in the refrigerator and frost before serving for that just-baked taste. Enjoy the convenience without sacrificing quality!
Expert Tips for Banana Bread Brownies
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Check for Doneness: Make sure to avoid overbaking; check your Banana Bread Brownies when the center is just set to keep them moist and chewy.
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Mixing Method: Mix the batter gently; overmixing can lead to denser brownie bars. Stir just until combined for the best texture.
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Warm Frosting: Frost the brownies while they are still warm to allow the brown butter frosting to melt slightly, creating a luscious topping.
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Cutting Technique: For clean slices, let the brownies cool completely in the pan before cutting; this helps maintain their shape and frosting integrity.
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Storage Reminder: Store any leftovers in an airtight container at room temperature for up to 3 days; they’re best enjoyed fresh, but will still be delicious!
How to Store and Freeze Banana Bread Brownies
Room Temperature: Store Banana Bread Brownies in an airtight container at room temperature for up to 3 days to keep them fresh and moist.
Fridge: If you prefer them chilled, you can refrigerate the brownies for up to 5 days. Just keep them in an airtight container to prevent drying out.
Freezer: For longer storage, freeze the brownies wrapped individually in plastic wrap and layered with parchment paper for up to 2 months.
Reheating: When ready to enjoy, simply thaw at room temperature or warm in the microwave for about 10-15 seconds to regain that fresh-baked taste.
What to Serve with Irresistible Banana Bread Brownies with Brown Butter Frosting
Pairing these delightful brownies with complementary flavors enhances their indulgent charm and creates a more satisfying experience.
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Cold Milk:
This classic pairing balances the sweetness and richness, making every bite feel like a comforting treat. -
Vanilla Ice Cream:
A scoop of creamy vanilla ice cream provides a cool contrast that melts beautifully into the warm brownies, elevating your dessert experience. -
Hot Chocolate:
Serve alongside a steaming cup of hot chocolate for a cozy pairing that intensifies the flavors of your brownies. -
Berry Compote:
A drizzle of fresh berry compote adds a tart and fruity element, cutting through the richness and giving a refreshing twist. -
Chopped Nuts:
Sprinkle some toasted pecans or almonds on top for an added crunch and nutty flavor that harmonizes with the brownie’s texture. -
Spiced Tea:
A cup of chai or spiced tea can create a warm, inviting atmosphere, enhancing the cozy vibes of the brownies. -
Caramel Drizzle:
A warm caramel sauce drizzled on top or served on the side adds an extra layer of decadence that’s utterly irresistible. -
Coconut Whipped Cream:
Light and fluffy, coconut whipped cream offers a tropical flair that complements the banana flavors delightfully.
Indulge in these pairings to create a memorable dessert experience that everyone will love!

Banana Bread Brownies with Brown Butter Frosting Recipe FAQs
How do I choose ripe bananas for this recipe?
Absolutely! For the best flavor and moisture in your Banana Bread Brownies, select bananas that are very ripe, with plenty of brown spots or even a mostly brown peel. These bananas will be naturally sweet and easier to mash, enhancing the overall taste of your brownies.
What’s the best way to store leftover brownies?
Very! Store your Banana Bread Brownies in an airtight container at room temperature for up to 3 days. If you prefer them chilled, pop them in the refrigerator for up to 5 days.
Can I freeze Banana Bread Brownies?
Absolutely! To freeze your brownies, wrap them individually in plastic wrap, then layer them between sheets of parchment paper in an airtight container. They can be frozen for up to 2 months. To enjoy, just thaw them at room temperature or warm them in the microwave for about 10-15 seconds.
Why did my brownies turn out dense?
If your Banana Bread Brownies are dense, it might be due to overmixing the batter or using baking soda that’s lost its potency. Mix the ingredients gently until just combined to maintain a light texture, and always check the freshness of your baking soda before use.
Can I use substitutes for dietary needs?
Absolutely! If you need a dairy-free version, substitute butter with margarine and use dairy-free milk for the frosting. For egg alternatives, two tablespoons of flaxseed meal mixed with three tablespoons of water can act as a binding agent—just let it sit for a few minutes to thicken!
What if I don’t have sour cream on hand?
Very! Greek yogurt is a fantastic substitute for sour cream in this recipe. It will maintain the moisture and tenderness of your Banana Bread Brownies while giving them a slightly tangy flavor that complements the sweetness of the bananas beautifully.

Moist Banana Bread Brownies with Brown Butter Frosting Magic
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C) and grease a 15x10-inch jelly roll pan.
- Combine sugar, sour cream, melted butter, and eggs in a mixing bowl. Beat until creamy and well-combined (2-3 minutes).
- Mix in the mashed ripe bananas and vanilla extract until fully incorporated.
- Sift in all-purpose flour, baking soda, and salt. Fold gently until just combined. Add chopped walnuts if desired.
- Pour the batter into the prepared pan and spread evenly. Bake for 20-25 minutes or until edges are golden and a toothpick comes out mostly clean.
- To make the brown butter frosting, melt butter in a saucepan over medium heat until golden brown and nutty (5-7 minutes).
- Whisk in powdered sugar, vanilla extract, and milk until smooth and creamy.
- Pour the frosting over warm brownies and spread it evenly.
- Allow to cool in the pan for at least 30 minutes before slicing into squares.

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