Banana Bread Bars Recipe With Brown Butter Frosting

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This banana bread bars recipe with brown butter frosting is a great way to use up those old bananas sitting on your counter. Moist banana bread meets nutty, decadent frosting in every delicious bite.

Moist banana bars with brown butter frosting are a delicious dessert.
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Does this happen in your family?

You buy a small bunch of bananas, bring them home, and the family devours them within a few hours.

The next time you head to the grocery store, you decide to play it safe and purchase a bigger bunch (thinking they’ll last for a few days) only to find that no one eats them. So, the bananas sit neglected on the counter each day getting riper and riper until no one will eat the bananas because they’re brown.

This scenario is a familiar tale in our household.

I’ve found a few ways to not let those old bananas go to waste through the years by using them in breads, pancakes, and/or smoothies.

However, these banana bread bars with brown butter frosting just might be a new family favorite.

This delicious recipe is the perfect blend of moist banana bread with a velvety brown butter frosting that takes the classic banana bread to a whole new level.

If you’ve ever faced the same banana dilemma in your household, this recipe is your solution.

Say goodbye to wasted bananas and hello to a treat that will have your family eagerly waiting for the next bunch of brown bananas!

Moist banana bars recipe with browned butter frosting.

If you enjoy this recipe, please leave a comment and a 5-star review!

Why You’ll Want to Make This Easy Banana Bars Recipe

Not only is this recipe incredibly delicious and budget friendly…but oh my goodness! The smell that will permeate your home when the bars are baking in the oven is pure heaven.

This banana bread bars with brown butter frosting recipe will transport you back to your grandmother’s kitchen, where warmth and love were baked into every heartfelt creation. 

The simplicity of the ingredients and the ease of preparation add to the charm of this recipe, allowing you to recreate the nostalgia of a great dessert. 

This easy treat is not just about baking something delicious; it’s about creating a cozy experience that connects you to cherished memories and timeless flavors. 

What you’ll love about this recipe:


  • EASY TO MAKE – These bars are simple to make without compromising on flavor, making it the perfect go-to recipe for those with busy schedules.
  • USES OLD FRUIT – This recipe transforms overripe bananas into moist and flavorful banana bread bars. It’s a delicious solution that reduces food waste and turns neglected bananas into a satisfying dessert.
  • INEXPENSIVE – The simple and accessible ingredients required for both the banana bread bars and the brown butter frosting ensure that you can treat your taste buds to homemade deliciousness without breaking the bank.
Best banana bars dessert that used overripe banana for a nostalgic treat.

What You’ll Need to Make Banana Bread Bars

Prepare for a nostalgic baking adventure with these simple ingredients for moist banana bread bars.

Grab ripe bananas, granulated sugar, all-purpose flour, eggs, sour cream, vanilla extract, and baking soda. Top it off with a luscious brown butter frosting using butter and powdered sugar.

With these ingredients, you’re ready to create the best banana bars that will fill the heart of the home with irresistible aromas.

Jump to Recipe

Banana Bread Bar Ingredients

  • 1 1/2 cups Granulated Sugar: Adds the perfect level of sweetness to the batter.
  • 1 cup Sour Cream: Brings a rich and tangy element to the recipe, ensuring the banana bars are tender and moist.
  • 1/2 cup Salted Butter: Adds a rich and savory note to the bars, balancing the sweetness of the sugar and bananas.
  • 2 Large Eggs: The binder for the bars.
  • 4 Ripe Bananas, mashed: The star ingredient of this recipe. Ripe bananas not only impart a natural sweetness but also bring a distinct banana flavor and moisture to the bars. Their mashed form ensures even distribution throughout the batter.
  • 2 teaspoons Pure Vanilla Extract: Its sweet and comforting flavors complement the banana. I prefer to make my own vanilla extract which adds more depth of flavor to the dessert.
  • 2 cups All Purpose Flour: Provides the necessary gluten for the bars to rise and maintain a soft texture.
  • 1 teaspoon Baking Soda: The leavening agent that gives lift and fluffiness to the bars.

Brown Butter Frosting Ingredients

  • 1/2 cup Salted Butter: Melted and carefully browned, the butter adds a nutty richness to the frosting.
  • 4 cups Powdered Sugar: Sweetens the frosting while contributing to its smooth and velvety texture.
  • 1 1/2 teaspoons Pure Vanilla Extract: Enhancing the overall flavor profile of the frosting, vanilla extract adds sweet and aromatic undertones.
  • 3 tablespoons Milk: The liquid that ensures the frosting achieves the desired consistency.

TOOLS YOU’LL NEED

The Banana Bar Recipe

Preheat the oven to 375°F.

Grease and flour or parchment paper line a 12″x9″ baking dish.

Handy Tip!

Aim for smooth and uniform mashed bananas. Use a fork or potato masher to thoroughly mash the ripe bananas until no large lumps remain.

For the bars beat together with an electric mixer (or stand mixer) sugar, sour cream, butter, and eggs in a large bowl until the mixture becomes creamy.

Then, incorporate mashed bananas and vanilla extract.

Mix in the flour and baking soda into the wet ingredients, making sure not to over mix. 

Spread the batter into the prepared pan and bake in the preheated oven for 20-25 minutes or until golden brown.

While the bars bake, prepare the browned butter frosting. 

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In a large saucepan over medium heat, melt 1/2 cup butter until it starts boiling and turns a soft caramel color.

To the browned butter add the confectioners’ sugar, vanilla extract, and milk. Whisk the ingredients until smooth, and the consistency is thicker than a glaze but thinner than frosting.

Using a spatula spread the brown butter frosting over the warm bars. 

Enjoy!

Delicious banana bread recipe with all purpose flour, sugar, and brown bananas.

Tips & Tricks

  • For the best flavor and sweetness, use super ripe bananas. The ones with brown spots on the peel are ideal as they mash easily and intensify the banana flavor in the bars.
  • Take your time when browning the butter for the frosting. The nutty aroma and golden brown color are signs of success. Be sure to avoid burning, as it will impact the flavor.
  • When combining the wet and dry ingredients for the banana bread bars, mix until just combined. Overmixing can lead to a denser texture.
  • To ensure the bars are perfectly baked, insert a toothpick into the center, and if it comes out clean or with a few moist crumbs (not wet batter), you’ll know they are ready.

Banana Bars Variations & Substitutions

Variations of this banana bread bars recipe provides an opportunity to cater to different tastes and those with a medically restrictive diet. 

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Whether you’re looking to accommodate specific dietary restrictions, add a unique twist, or experiment with flavors, these variations offer versatile options to a classic dessert.

  • Gluten Free: For those with gluten sensitivities or celiac disease, substitute the all purpose flour with a gluten-free flour blend. Ensure the blend contains a binder like xanthan gum to maintain the desired texture in the banana bread bars.
  • Dairy Free: Substitute the sour cream with dairy free alternatives like coconut milk yogurt or almond milk yogurt. This modification maintains the moisture in the bars while accommodating those with lactose intolerance.
  • Sugar Alternatives: Use alternative sweeteners like maple syrup, honey, or coconut sugar for a refined sugar free option.
  • Nutty Crunch: Change the texture by incorporating chopped nuts such as walnuts, pecans, or almonds into the banana bread batter. This adds a delightful crunch and a layer of nutty richness to complement the brown butter frosting.
  • Dried Fruit: Mix in dried fruit such as raisins, cranberries, or chopped dried apricots. This variation adds a contrast to the sweetness of the banana bars.
  • Chocolate Chip Banana Bread: Fold in mini chocolate chips or chunks into the banana bread batter. The combination of rich chocolate and the warm banana flavors creates a flavor that will satisfy any chocolate lover.

FAQs About Banana Bread Bars

Ripe bananas bring a natural sweetness to the bars which intensifies the overall flavor. Secondly, their soft texture makes them easy to mash ensuring even distribution throughout the batter. And finally, overripe bananas add moisture to the bars, contributing to their moist and tender consistency.

Yes, greek yogurt can be used in place of sour cream in this recipe. It maintains the moisture and tangy flavor, contributing to the overall richness of the banana bars. Use an equal amount of greek yogurt as a replacement for sour cream.

You can! Once they have cooled completely, wrap them tightly in plastic wrap or aluminum foil, making sure all sides are covered. Place the wrapped bars in a freezer-safe bag or airtight container and then store in the freezer for up to three months. When ready to enjoy, thaw the bars at room temperature or reheat them in the oven for a few minutes.

Best banana bars with brown butter frosting are an easy afternoon treat or nostalgic dessert.

How to Store Moist Banana Bars

Once the bars have cooled completely, store them in an airtight container at room temperature for up to two days.

If you want to keep them longer, refrigerate the bars in a sealed container. Place a piece of parchment paper between the layers to maintain their moist texture and prevent the frosting from becoming too soft.

Before serving, bring the bars back to room temperature to restore their softness.

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Moist banana bars recipe with browned butter frosting.
5 from 1 vote

Banana Bread Bars With Brown Butter Frosting

This banana bread bars with brown butter frosting recipe transforms overripe bananas into a moist and flavorful delight that embodies the cozy comforts of homemade treats. Whether you're creating a sweet surprise for loved ones or simply craving a nostalgic dessert, these banana bread bars are a delightful journey back to the heartwarming flavors of the past.
Print Recipe
Prep Time:15 minutes
Cook Time:25 minutes
Total Time:40 minutes

Ingredients

Banana Bread Bars

  • 1 1/2 cups Granulated Sugar
  • 1 cup Sour Cream
  • 1/2 cup Salted Butter room temperature
  • 2 Large Eggs room temperature
  • 4 Ripe Bananas mashed
  • 2 tsp Pure Vanilla Extract
  • 2 cups All-Purpose Flour
  • 1 tsp Baking Soda

Brown Butter Frosting

  • 1/2 cup Salted Butter
  • 4 cups Powdered Sugar
  • 1 1/2 tsp Pure Vanilla Extract
  • 3 tbsp Milk

Instructions

  • Preheat the oven to 375°F.
  • Grease and flour or parchment paper line a 12"x9" baking dish.
  • For the bars beat together sugar, sour cream, butter, and eggs in a large bowl until the mixture becomes creamy. Then, incorporate mashed bananas and vanilla extract.
  • Mix in the flour and baking soda to the banana mixture, making sure not to over mix.
  • Spread the batter into the prepared pan and bake in the oven for 20 to 25 minutes or until golden brown.
  • While the bars bake, prepare the frosting.
  • In a large saucepan over medium heat melt 1/2 cup butter until it starts boiling and turning a soft caramel color.
  • To the browned butter add powdered sugar, vanilla extract, and milk. Whisk the ingredients until smooth, and the consistency is thicker than a glaze but thinner than frosting.
  • Using a spatula spread the brown butter frosting over the warm bars.
  • Enjoy!

Notes

  • For the best flavor and sweetness, use super ripe bananas. The ones with brown spots on the peel are ideal as they mash easily and intensify the banana flavor in the bars.
  • Take your time when browning the butter for the frosting. The nutty aroma and golden brown color are signs of success. Be sure to avoid burning, as it will impact the flavor.
  • When combining the wet and dry ingredients for the banana bread bars, mix until just combined. Overmixing can lead to a denser texture, so a gentle hand is key.
  • To ensure the bars are perfectly baked, insert a toothpick into the center, and if it comes out clean or with a few moist crumbs (not wet batter), they are ready.

Nutrition

Serving: 1bar | Calories: 254kcal | Carbohydrates: 39g | Protein: 4g | Fat: 9g | Saturated Fat: 6g | Cholesterol: 47mg | Sodium: 268mg | Potassium: 122mg | Fiber: 1g | Sugar: 24g | Vitamin A: 313IU | Vitamin C: 2mg | Calcium: 24mg | Iron: 1mg
Course: Dessert, Snack
Cuisine: American
Keyword: Banana, Banana Bread, Bars, Brown Butter Frosting
Servings: 16
Calories: 254kcal

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Moist banana bars with brown butter frosting are a delicious dessert.
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