These delicious Banana Bread Brownies may be my favorite way to use ripe bananas, and are made extra moist with the addition of Greek yogurt. They’re topped with finger-licking brown butter glaze.
Other go-to recipes for using up my ripe bananas are Banana Cakebanana bran muffins or this delicious skinny banana bread recipe.
Banana Bread Bars with browned butter frosting | tastesbetterfromscratch.com

We enjoy every last bite of these cake-like banana bread bars because they never last long when I make them. The brown butter frosting is only 4 simple ingredients and makes them outstanding. You can customize the bars by adding nuts or chocolate chips instead of frosting, and I like to cut them into small squares for a bite size after school treat.

How to Make Banana Bread Brownies:

Mix we Ingredients: Cream butter and sugar: Beat in the sour cream and eggs, bananas and vanilla extract.

Add dry ingredients: flour, baking soda, salt, and mix just until moistened. Stir in walnuts, if using.

Bake: Pour batter into a 9×13 inch baking pan or half sheet pan. For a 9×13’’ pan, bake for 23-28 minutes or until a toothpick inserted in the center comes out clean or with few crumbs.

Four process photos for making banana bread bars including mixing the batter, pouring into a baking pan, and baking.

Make the glaze: Heat butter over medium heat and allow it to come to a simmer until it turns a delicate brown (watch carefully so you don’t burn the butter). Remove from heat immediately. Whisk in the powdered sugar, vanilla extract and milk until smooth.

Pour Glaze over Bars: This is easiest when the bars are warm.  Spread gently with the back of a spoon.

Banana Bread Bars from tastesbetterfromscratch.com

Recipe Variations:

  • Add nuts: add chopped walnuts or pecans to the batter before baking.
  • Add chocolate chips: add mini milk or semi sweet chocolate chips.
  • Change the frosting: I love the brown butter frosting but this cream cheese frosting would also be delicious.
  • Healthier banana bread bars: cut the sugar in half for a lighter version and use 3-4 Tbs of butter for the frosting instead of 6.

Make Ahead And Freezing Instructions:

To make ahead: bake and frost them one to two days ahead of time.  Store them covered, in the refrigerator.

To freeze: allow them to cool completely and freeze them frosted or unfrosted right in the pan.  Cover them well with plastic wrap and aluminum foil before freezing and freeze for up to 3 months.  Allow to thaw completely before serving.

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Recipe

Banana Bread Bars with browned butter frosting | tastesbetterfromscratch.com
Prep 10 mins
Cook 25 mins
Total 35 mins
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Video

Ingredients
  

For the Banana Bread Bars:

  • 1-1/2 cups granulated sugar
  • 1 cup plain Greek yogurt (or sour cream)
  • 1/2 cup butter softened
  • 2 large eggs
  • 3-4 ripe bananas mashed
  • 2 teaspoons vanilla extract
  • 2 cups all-purpose flour
  • 1 teaspoon baking soda
  • 3/4 teaspoon salt

For the Glaze:

  • 4 Tablespoons butter
  • 2 cups powdered sugar
  • 1 teaspoon vanilla extract
  • 1-2 Tablespoon milk

Instructions
 

  • Preheat oven to 375 degrees F and grease a 9×13 inch pan with non-stick cooking spray.
  • In a large bowl, cream together the sugar and butter. Beat in the sour cream and eggs, bananas and vanilla extract.  
  • Add the flour, baking soda, salt, and mix just until moistened. Stir in walnuts, if using.
  • Spread batter evenly into prepared pan and bake for 23-28 minutes or until a toothpick inserted in the center comes out clean, or with few crumbs. Make frosting while the bars bake.

For the Brown Butter Frosting:

  • Heat the butter in a large skillet over medium heat. Allow it to come to a simmer until it starts to turn a delicate brown and has a nutty aroma (watch carefully so you don't burn the butter!) Remove from heat immediately.
  • Whisk in the powdered sugar, vanilla extract and 1 tablespoon of milk until smooth. (Add a little more powdered sugar, or milk, if needed to thicken or thin the frosting). Pour the warm frosting over the warm bars.  Spread gently with the back of a spoon.

Notes

Recipe Variations:
  • Add nuts: add chopped walnuts or pecans to the batter before baking.
  • Add chocolate chips: add mini milk or semi sweet chocolate chips to batter before baking.
  • Change the frosting: I love the brown butter frosting but this cream cheese frosting would also be delicious. 
  • Healthier banana bread bars: cut the sugar in half for a lighter version and use 3-4 Tablespoons of butter for the frosting instead of 6.
Make ahead Instructions: bake and frost one to two days ahead of time.  Store covered, in the refrigerator.
Freezing Instructions: allow them to cool completely and freeze them frosted or unfrosted, right in the pan.  Cover well with plastic wrap and aluminum foil before freezing and freeze for up to 3 months. Allow to thaw completely before serving.

Nutrition

Calories: 254kcalCarbohydrates: 39gProtein: 4gFat: 9gSaturated Fat: 6gCholesterol: 47mgSodium: 268mgPotassium: 122mgFiber: 1gSugar: 24gVitamin A: 313IUVitamin C: 2mgCalcium: 24mgIron: 1mg

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Have you tried this recipe?! 
RATE this recipe and COMMENT below! I would love to hear your experience.

I originally shared this recipe June 2017. Updated January 2021.

Process photos by Nikole from The Travel Palate.

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About The Author

Lauren Allen

Welcome! I’m Lauren, a mom of four and lover of good food. Here you’ll find easy recipes and weeknight meal ideas made with real ingredients, with step-by-step photos and videos.

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  1. Made this recipe but sprinkled 1/8 cup cocoa powder on top of batter & swirled it thru batter with a knife. Cut back sugar to 1 cup.
    Great recipe
    Thank you for sharing!

  2. 5 stars
    Always a hit! I’ve made this a few times now and everyone loves it. It’s easy and really does freeze very well.

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