These Blondies with Peanut Butter and Marshmallow Fluff are a childhood dream. The peanut butter and marshmallow combination is delicious! They are easy to make with simple ingredients.

fluffernutter bars in a baking pan

These bars were gone the same day I made them. They are THAT good!

It might be best to make two batches instead of one so that you don’t have to worry about running out.

If you’re a peanut butter lover like myself, this recipe is perfect for you.

These Peanut Butter Blondies are the perfect way to enjoy this magical combo of peanut butter and marshmallow. It reminds me of enjoying a fluffernutter as a kid!

So grab your peanut butter, marshmallows and the other ingredients outlined below. We’ve got tasty Vegan Blondies to make!

Main Ingredients

Frequently Asked Questions

Can these blondies be made vegan?

You can use a flax egg instead of a regular egg as well as a vegan butter to make this recipe vegan. You will also want to use vegan marshmallows.

What kind of peanut butter should I use?

I highly recommend using a creamy, all natural peanut butter as it is looser texture than a more processed peanut butter.

TIP: Heat in the microwave at 15 second intervals to loosen up the peanut butter before adding it to the batter.

How do I know the Blondies with Peanut Butter and Marshmallow Fluff are done baking?

A toothpick should come out of the center clean (with maybe a few crumbs).

Do I have to let the blondies cool before slicing?

Yes! Let the blondies cool completely before slicing as this will allow for a clean cut.

How do I store the bars?

Store in an airtight container at room temperature for up to 5 days. You can also freeze the bars for up to 1 month. When ready to eat, reheat in the microwave for 30 seconds.

fluffernutter bars in a baking pan

Blondies with Peanut Butter and Marshmallow Fluff

Prep Time: 10 minutes
Cook Time: 18 minutes
Total Time: 28 minutes
Yield: 9 servings
These Blondies with Peanut Butter and Marshmallow Fluff are a childhood dream. The peanut butter and marshmallow combination is delicious! They are easy to make with simple ingredients.
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Ingredients
 

  • 1/2 cup brown sugar
  • 1/4 cup granulated sugar
  • 1/4 cup salted butter, melted
  • 1/4 cup almond milk
  • 1 egg
  • 1 egg yolk
  • 2 tsp vanilla extract
  • 1/2 cup creamy salted peanut butter, divided
  • 1 cup all purpose flour, or all purpose gluten free flour
  • 1/2 cup mini marshmallows
  • 1/2 cup peanut butter chips, for topping
  • 1/4 cup marshmallow fluff, for topping

Instructions
 

  • Preheat the oven to 350 degrees F
  • Add the eggs, brown sugar, butter, milk, creamy peanut butter and vanilla extract to a large mixing bowl
  • Mix until fully combined
  • Add flour and mix until just combined
  • Fold in the mini marshmallows
  • Line a 8×8 baking dish with parchment paper or grease with non-stick spray
  • Transfer the batter into the pan and spread in an even layer
  • Swirl in 2 tbsp of creamy peanut butter and marshmallow fluff
  • Top with the peanut butter chips
  • Bake in the oven for 28-30 minutes, until the batter is fully baked (a toothpick should come out of the center clean!)
  • Let cool completely before slicing
  • Slice and enjoy!

Nutrition

Calories: 286kcal, Carbohydrates: 37g, Protein: 6g, Fat: 14g, Saturated Fat: 5g, Polyunsaturated Fat: 2g, Monounsaturated Fat: 5g, Trans Fat: 0.2g, Cholesterol: 53mg, Sodium: 125mg, Potassium: 124mg, Fiber: 1g, Sugar: 23g, Vitamin A: 213IU, Calcium: 35mg, Iron: 1mg
Author: Jessica Selensky
Course: Dessert, Snack
Cuisine: American
Keywords: Blondies with Peanut Butter, desserts, Fluffernutter, Marshmallow Fluff, Peanut Butter and Marshmallow Fluff, peanut butter blondies

If you try these Blondies with Peanut Butter, please consider leaving a rating and comment at the end of this blog post! It is incredibly helpful to my small business and to your fellow readers.