Banana Blondies

Super delicious, moist, and easy-to-make, this vegan Banana Blondies recipe comes with a Creamy Peanut Butter Frosting that will tempt your tastebuds. Banana cookie bars are made with only 11 ingredients and take only 30 minutes. You’ll love this fabulous dessert that will have everyone begging for more! Here are even more tasty Vegan Banana Recipes.

A stack of banana blondies with peanut butter frosting sits in front of more slices and bananas in the background.

This banana blondie recipe is one of my favorite go-to desserts, especially when I’m craving bananas (which is all the time). Adding a peanut butter frosting combines some favorite flavors together in every bite!

Why This Recipe is a Winner

  • Using brown sugar in the batter creates extra moist blondies with hints of caramel flavor
  • Adding a mashed banana makes the blondies moist and infuses them with the perfect amount of banana flavor
  • Topping blondies with peanut butter frosting completes the flavor profile, adding delicious flavor and texture to every bite

What You Need

Ingredients are displayed on a table. The labels next to them read, salt, brown sugar, vanilla, banana, flax egg, vegan butter, and flour.

You can find the full printable recipe, including ingredient quantities, below. But first, here are some explanations of ingredients and steps to help you make this recipe perfect every time.

Here are the ingredients you’ll need for this recipe:

  • Vegan Butter — Use vegan butter or substitute melted coconut oil.
  • Flax egg — You can use a Flax Egg or substitute a Chia Seed Egg.
  • Brown sugar — Use light, dark, or homemade brown sugar.
  • Flour — I used all-purpose flour, but you can substitute Whole Wheat Pastry Flour or even gluten-free baking flour.
  • Peanut butter — I use creamy peanut butter to make the frosting.
  • Coconut oil — Using refined coconut oil will yield a more neutral flavor.
  • Plant-based milk — You can use any plant-based milk, such as almond, soy, etc

Ingredient Spotlight

A bunch of 3 very ripe bananas sit on a white counter.

What Bananas are Best?

Look for bananas with a few or even a lot of brown spots. If the banana is too ripe (verging on dark brown or even black), the flavor may be too overpowering and the consistency too soft.

How to Make Banana Blondies

  1. Stir together the wet ingredients.
  2. Stir together the flour and salt.
  3. Make the batter by stirring together the wet and dry mixtures.
  4. Spread the batter into a prepared pan.
  5. Bake until done.
  6. Prepare the frosting and spread over partially cooled blondies.

Here are more detailed step-by-step instructions.

Step One: Prepare the Batter

Wondering what to make with old bananas? How about these easy banana blondie brownies? I tell you, it’s easy to make these blonde banana bars.

  1. Melt vegan butter in a microwave-safe bowl in the microwave for about 20 or 30 seconds.
  2. Add the flax egg, brown sugar, mashed banana, and vanilla and stir until well incorporated.
    A mixture of mashed bananas and other ingredients are in the bottom of a glass bowl.
  3. In a separate, small bowl combine the flour and salt and give it a whisk to combine.
  4. Add the flour mixture to the banana batter and give it a good stir.
    Gluten-free flour is being poured into a bowl with the wet ingredients.

Step Two: Bake Blondies

  1. Pour the banana blondie batter into a prepared pan.
  2. Bake for 25 minutes, until a toothpick inserted into the middle comes out clean.
  3. Remove from the oven and set aside to cool slightly.

Step Three: Peanut Butter Frosting

This peanut butter frosting transforms these banana blondies into something pretty amazing. Here’s how to make it:

  1. Stir together the peanut butter and coconut oil.
  2. Stir in the powdered sugar and stir until you have a crumbly mixture.
    Looking down on a bowl with a crumbly peanut butter mixture in it.
  3. Add the plant-based milk one tablespoon at a time until you reach a desired, spreadable consistency.
    Looking down on banana blondie batter in a bowl. There's a wooden spoon for stirring sticking out of the side.
  4. Allow banana blondie bars to cool for about 10 to 15 minutes before frosting.

Frosting Options

If Vegan Peanut Butter Frosting is not your favorite, here are some delicious vegan frosting options:

Storage Tips

Cut blondies into squares and transfer them to an airtight container. They will keep at room temperature for up to 4 days or in the fridge for up to 10 days. They can be frozen for up to 2 months.

Slices of banana brownies sit in front of yellow bananas.

Marly’s Tips

  • You can add up to a teaspoon of cinnamon to the blondie batter
  • For a festive event, add some colorful sprinkles on top
  • Make banana chocolate chip blondies by adding a cup of dairy-free chocolate chips to the batter.
  • Make it a bit lighter by halving the peanut butter frosting on top.

Serving Suggestions

I highly recommend making these banana blondies and then serving them with any of the following:

Frequently-Asked Questions

Can you freeze banana blondies?

You can freeze blondies by wrapping them tightly in plastic wrap or transferring slices to a freezer bag. They can be frozen for up to 2 months when stored properly.

How are blondies different than brownies?

Whereas brownies are infused with chocolate flavor, blondies have notes of caramel thanks to the use of brown sugar in the batter. You can add different flavorings, such as bananas, to accommodate different tastes.

What is the texture of a blondie?

A blondie texture is very similar to a brownie, in that it is dense and gooey. The trick to achieving gooey blondies is to not use a leavener (such as baking soda or baking powder) and to not overbake them.

Looking down on slices of banana blondies.

Banana Dessert Favorites

If you love these banana blondies, here’s even more banana dessert recipes to try:

A closeup of a stack of banana blondies with peanut butter frosting. There are more slices and bananas in the background.

Banana Blondies

These Banana Blondies are topped with a delicious creamy peanut butter frosting. They take only a few easy ingredients and 30 minutes to prepare!
5 from 2 votes
Course: Dessert
Cuisine: American
Prep Time: 5 minutes
Cook Time: 25 minutes
Resting Time: 10 minutes
Total Time: 40 minutes
Servings: 9
Calories: 393kcal

Ingredients

For the Banana Blondies:

  • ½ cup vegan butter, melted
  • 1 flax egg
  • 1 cup brown sugar
  • ½ cup mashed ripe banana 1 banana mashed with a fork
  • 1 tablespoon vanilla extract
  • 1 ¼ cup all-purpose flour
  • ¼ teaspoon salt

For the Creamy Peanut Butter Frosting:

  • ¼ cup creamy peanut butter
  • 2 tablespoons coconut oil, melted
  • 1 cup powdered sugar
  • 2 to 4 tablespoons plant-based milk almond, soy, etc

Instructions

For the Banana Blondies:

  • Preheat oven to 350°F/175°C and spray an 8×8-inch baking pan with a light coating of vegetable spray.
  • Stir together the melted butter, flax egg, brown sugar, mashed banana, and vanilla.
  • In a separate, small bowl combine the flour and salt and give it a whisk to combine. Add the flour to the banana batter. Stir to combine.
  • Pour the batter into your prepared pan and bake for 25 minutes, until a toothpick inserted into the middle comes out clean.
  • Allow bars to cool for about 10 to 15 minutes before adding the frosting.

For the Creamy Peanut Butter Frosting:

  • Combine the peanut butter and coconut oil in a medium-size bowl. Stir to combine.
  • Add the powdered sugar and stir until you have a crumbly mixture. Add the plant-based milk one tablespoon at a time until you reach a desired, spreadable consistency.
  • Spread over slightly cooled blondies.

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Notes

You can substitute coconut oil for vegan butter. 
You can substitute whole wheat pastry flour or gluten-free baking flour for all-purpose flour.
Add up to a teaspoon of cinnamon to the blondie batter
Make it a bit lighter by halving the peanut butter frosting on top.
Calories: 393kcal | Carbohydrates: 55g | Protein: 4g | Fat: 17g | Saturated Fat: 5g | Sodium: 226mg | Potassium: 165mg | Fiber: 1g | Sugar: 39g | Vitamin A: 465IU | Vitamin C: 1.1mg | Calcium: 38mg | Iron: 1.2mg

The nutrition information shown is an estimate provided by an online nutrition calculator and should not be considered a substitute for a professional nutritionist’s advice.

This post was originally published in 2018 and was updated to include new photos, new text, and an updated recipe in 2021.

22 Responses to Banana Blondies

  1. Avatar thumbnail image for Marlybake and bekary Reply

    5 stars
    I have these in the oven now while my wife is sleeping. I wanted to surprise her tomorrow! The batter was amazing! Can’t wait to give them a try. I’m using my grandmothers old fashioned cooked peanut butter icing which I veganized. So delicious pours right over the top and firms up into a soft peanutbutter fudge.

    • Avatar thumbnail image for MarlyMarly

      I hope your wife loved these blondies. And you grandma’s cooked peanut butter frosting sounds amazing!

  2. Avatar thumbnail image for MarlyRobyn Pooldaily Reply

    5 stars
    I made these gluten-free and they turned out amazing! Great Job!!

    • Avatar thumbnail image for MarlyMarly

      Thanks, Robyn! I’m so glad you like these blondies…and that the gluten-free worked for you too!

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