Delight in the yumminess of Easy Banana Bars with Brown Butter Frosting. Whether you're serving them at a special occasion or enjoying a moment, our banana bars are the perfect treat for any dessert lover. Get ready for a journey of flavors and make your batch today!

As a passionate foodie, I can't help but gush over banana bars. There's something truly magical about the combination of ripe, sweet bananas and the tender, moist texture of these bars. Whether I enjoy them as a quick afternoon treat or pair them with a warm cup of coffee, banana bars never fail to bring a smile to my face. They're a simple pleasure, reminding me of home-baked love and family gatherings.
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Try some of our other favorite bars and brownies, such as: Slutty Brownies, Lemon Cheesecake Bars, Delicious Pumpkin Bars, or The Best Mississippi Mud Brownies.
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What ingredients do I need for Banana Bread Brownie Bars?
Banana Bars
- granulated sugar
- sour cream or greek yogurt
- unsalted butter
- eggs
- bananas
- vanilla extract
- all purpose flour
- baking soda
- salt
- walnuts (optional)
Brown Butter Frosting
- unsalted butter
- powdered sugar
- whole milk
- vanilla extract
FAQs
Banana Bars with Brown Butter Frosting are moist and flavorful dessert bars made with ripe bananas and topped with a rich, nutty brown butter frosting. They are a delicious way to use up overripe bananas and are perfect for any occasion.
Yes, you can freeze the banana bars (preferably without frosting) for up to 2 months. Wrap the cooled bars tightly in plastic wrap and then in aluminum foil or place them in a freezer-safe container. Thaw in the refrigerator overnight and frost before serving.
If the frosting is too thick, add a little more milk, one tablespoon at a time, until you reach the desired consistency.
If the frosting is too thin, add more powdered sugar, a little at a time, until it thickens up.
Top Tips
- Ripe Bananas: Use ripe bananas with brown spots on the skin for the best flavor and sweetness. They are easier to mash and will infuse the bars with a rich banana taste.
- Brown Butter Frosting: Take your time when browning the butter for the frosting. Watch it closely as it can go from perfectly browned to burnt quickly. Once browned, cool the butter slightly before using it in the frosting.
- Don't Overmix: When combining the wet and dry ingredients, mix just until everything is incorporated. Overmixing can lead to tough and dense bars.
- Optional Garnish: For added visual appeal and a touch of crunch, you can sprinkle some chopped nuts or banana slices on top of the frosted bars.
- Store the brownies in an airtight container at room temperature for up to 3 days or in the refrigerator for up to a week.
How to make Banana Bread Bars
- Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan and set it aside.
- In a large mixing bowl, cream together the softened butter, eggs, sour cream, and granulated sugar until light and fluffy.
- In a small bowl, mash the bananas with a potato masher or fork.
- Add mashed bananas, all purpose flour, baking soda, salt, and vanilla extract. Mixing until smooth.
- Fold in the walnuts, if you are using them.
- Spread into your prepared baking pan. Bake in preheated oven for 20-25 minutes or until a toothpick tested in the center comes out clean. Remove from oven and cool.
- Gather the ingredients for the brown butter frosting.
- In a large pan, over medium heat, melt the butter. Cook until it has turned a golden brown, with a nutty aroma (about 3-4 minutes). Quickly remove from heat, so you do not burn it.
- Whisk in powdered sugar, milk, and vanilla extract, until smooth.
- Spread quickly over the banana bars, as the frosting will thicken fast. Sprinkle with extra walnuts or banana slices. Slice and enjoy!
Banana Bread Bars with Brown Butter Frosting
Ingredients
Banana Bars
- 1 ½ cups granulated sugar
- 1 cup sour cream or greek yogurt
- ½ cup (1 stick) unsalted butter
- 2 eggs
- 3 bananas, mashed
- 1 tablespoon vanilla extract
- 2 cups all purpose flour
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 cup walnuts, chopped (optional)
Brown Butter Frosting
- ½ cup (1 stick) unsalted butter
- 4 cups powdered sugar
- ¼ cup whole milk
- 2 teaspoon vanilla extract
Instructions
Banana Bars
- Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan and set it aside.
- In a large mixing bowl, cream together the softened butter, eggs, sour cream, and granulated sugar until light and fluffy.
- In a small bowl, mash the bananas with a potato masher or fork.
- Add mashed bananas, all purpose flour, baking soda, salt, and vanilla extract. Mixing until smooth.
- Fold in the walnuts, if you are using them.
- Spread into your prepared baking pan. Bake in preheated oven for 20-25 minutes or until a toothpick tested in the center comes out clean. Remove from oven and cool.
Brown Butter Frosting
- Gather the ingredients for the brown butter frosting.
- In a large pan, over medium heat, melt the butter. Cook until it has turned a golden brown, with a nutty aroma (about 3-4 minutes) Quickly remove from heat, so you do not burn it.
- Whisk in powdered sugar, milk, and vanilla extract, until smooth.
- Spread quickly over the banana bars, as the frosting will thicken fast. Sprinkle with extra walnuts or banana slices. Slice and enjoy!
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