Peanut Butter Marbled Brownies Recipe


5 from 1 vote
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Peanut butter and brownies make for one delicious combination! Marbled together, they are out of this world.

Peanut Butter Marbled Brownies Recipe from

It’s no secret my affinity for all things peanut butter and chocolate. I think my love of them has been well-established, but oh my goodness gracious, these brownies! They are right at the top of the list for goodies with one of my all-time favorite combinations!

I began with my favorite fudge brownie recipe, but you can use your favorite recipe or even a mix from a box if you prefer.

Once I spread the brownie batter into the pan, I mixed together the peanut butter portion.

Let me just tell you – this part tastes like the inside of a peanut butter cup and is something that I could easily just eat with a spoon!

Talk about peanut butter heaven!

I plop large dollops of the peanut butter mixture onto the brownie batter and then use a skewer or knife and swirl the peanut butter throughout the brownie batter to make a marbled look.

In reality, while it does look amazing, I love that by marbling the peanut butter with the brownie, I’m sure to get that delicious combination in every single bite!

Here’s my Peanut Butter Marbled Brownies recipe. I think you’ll love ’em!

Peanut Butter Marbled Brownies Recipe

5 from 1 vote
Peanut Butter Marbled Brownies. Peanut butter and brownies make for one delicious combination! Marbled together, they are out of this world.
Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes
Servings: 16


  • 1 Fudge Brownies Recipe, or your favorite
  • 6 tablespoons (102 g) peanut butter
  • 2 – 3 tablespoons (14-21 g) confectioners sugar


  • Preheat oven to 350º F. Spray an 8-inch baking dish with nonstick cooking spray or coat lightly with butter.
  • Prepare fudge brownies according to recipe instructions and spread into the prepared baking dish.
  • Stir together peanut butter and confectioners sugar in a small bowl. Drop large dollops evenly over the top of the brownie batter.
  • Swirl the peanut butter into the brownie batter with a skewer or a knife.
  • Bake 30 minutes or until the center of the brownies do not move when baking pan is moved or a toothpick inserted in the center comes out with some brownie clinging to it but not liquid.
  • Remove from the oven and allow to cool completely before slicing.


Calories: 310kcal | Carbohydrates: 39g | Protein: 6g | Fat: 17g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Cholesterol: 83mg | Sodium: 227mg | Potassium: 171mg | Fiber: 2g | Sugar: 29g | Vitamin A: 43IU | Calcium: 6mg | Iron: 1mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Your peanut butter n’ chocolate lovin’ friend!
Robyn xo

Peanut butter and brownies make for one delicious combination! Marbled together, they are out of this world.

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About Robyn

Robyn Stone is a cookbook author, wife, mom, and passionate home cook. Her tested and trusted recipes give readers the confidence to cook recipes the whole family will love. Robyn has been featured on Food Network, People, Southern Living, and more.

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Recipe Review


  1. Denise Young says:

    What would be a good brownie recipe?

    1. Robyn Stone says:

      Hi Denise,
      I like these Fudge Brownies. Here’s the link:

  2. Ducks n a Row says:

    How delicious! Pinned and yummed.
    Please stop by my party – Wonderful Wednesday Blog Hop- and share this tonight?

  3. Sammie says:

    5 stars
    These brownies are delicious. I love peanut butter in brownies and yours look beautiful with the marble effect and taste amazing. Great recipe Sammie x

  4. Laura @ Laura's Culinary Adventures says:

    Yum! This is such a great combination! I can’t get enough chocolate and peanut butter!

    1. Robyn Stone says:

      I can’t either! Love it maybe just a little too much! 🙂

  5. Robyn Stone says:

    Hi Katherine,
    I would add another tablespoon or so to the mixture until it not crumbly, but not entirely super smooth either. I hope that makes sense!

  6. Cake Chocolate Cheese says:

    Marbled brownies are always so popular! I’m with you… chocolate and peanut butter are the perfect brownie combination.

  7. Kathy says:

    I was just looking for a recipe like this 2 days ago! Thanks so much for posting this yummy looking one.

    1. Robyn Stone says:

      Great minds must think alike! I hope you enjoy it!

  8. Karen @ On the Banks of Salt Creek says:

    Chocolate and Peanut butter. I just don’t think there is a better pairing. So easy too. That is dangerous 🙂

    1. Robyn Stone says:

      It’s the best combo ever, I think! xo