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Home ยป Desserts

Peanut Butter Swirl Brownies

Updated: Jul 22, 2025 ยท Published: Aug 14, 2024 by Misty Tannery ยท This post may contain affiliate links ยท 2 Comments

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If you're a fan of rich, fudgyย chocolate browniesย with a creamy twist, theseย Peanut Butter Swirl Browniesย are a must-try! Where are all myย peanut butter and chocolate loversย out there?! Youโ€™re going to absolutely love this irresistible dessert combo.

Theyโ€™re incredibly easy to make because it starts with a brownie mix.ย Best of all, theyโ€™re the perfectย easy dessertย forย potlucks,ย parties, or any time you're craving a sweet treat. Always a crowd-pleaser and guaranteed to disappear fast!

Homemade peanut butter swirl brownies cut into squares
Rich, fudgy brownies swirled with creamy peanut butterโ€”your new favorite dessert!

These are amazing any time of the year and are perfect to take on the go to a potluck, party etc.

If you are looking for more peanut butter and chocolate recipes check out this recipe - - - Chewy Peanut Butter Chocolate Chip Cookies!

Jump to:
  • Ingredients
  • Instructions
  • Equipment
  • Storage
  • Other Yummy Treats

Ingredients

  • box 9x13 size fudge brownie mix
  • ingredients per box for brownies
  • mini semi sweet chips
  • creamy peanut butter
  • powdered sugar

See recipe card for quantities.

Instructions

Check out these step by step images or watch the video below to see it all in action!

Ingredients for peanut butter swirl brownies combined in bowl, including brownie mix, eggs, oil and chocolate chips
  1. Step 1: Combine all ingredients for brownie mix in bowl and stir well to combine
mixing the peanut butter and powdered sugar until smooth

2. Step 2: Combine warmed peanut butter and powdered sugar until smooth

Dropping spoonfuls of peanut butter on top of brownie batter

3. Step 3: Dropping spoonfuls of peanut butter mixture on top of brownie batter before swirling

swirling peanut butter mixture all through brownie batter

4. Step 4: Time for the fun partโ€”swirl in the peanut butter for that signature marbled look and taste

HINT: Swirl that peanut butter longs ways then side to side several times until you get the marbled effect you like!

Equipment

There are not many supplies needed for this recipe. A good quality pan is essential though! Check out my affiliate link HERE to see my favorite baking supplies!

Storage

As with any brownie recipe, these will stay fresh and delicious for about 3โ€“4 days,ย as long asย theyโ€™re tightly covered.ย Personally, I love toย slightlyย warm mine up each timeโ€”it just makes them even more gooey and irresistible!

Peanut Butter Swirl Brownies on a spatula
That yummy peanut butter swirl is irresistible

Other Yummy Treats

  • Individual chocolate chip skillet cookie with ice cream and rich hot fudge
    Individual Chocolate Chip Skillet Cookies
  • fudge iced brownies
    Fudgy Iced Brownies
  • No-bake chocolate haystacks made with chow mein noodles, stacked in clusters on parchment paper.
    Chocolate Hay Stacks
  • fudgy old fashioned chocolate cobbler
    Chocolate Cobbler

Peanut Butter Swirl Brownies on a spatula
Print Recipe
5 from 1 vote

Peanut Butter Swirl Brownies

These rich, fudgy Peanut Butter Swirl Brownies combine classic chocolate decadence with creamy peanut butter in every bite
Prep Time10 minutes mins
Cook Time25 minutes mins
Total Time35 minutes mins
Course: Dessert
Cuisine: American
Keyword: brownies, chocolate, dessert, feed a crowd, peanut butter, swirl
Servings: 12 large or 24 small
Calories: 340kcal
Author: Misty Tannery

Ingredients

  • 1 box 9x13 size fudge brownie mix + plus ingredients from directions
  • 2 Tablespoons mini semi sweet chocolate chips
  • 1 cup peanut butter
  • ยผ cup powdered sugar

Instructions

  • Preheat oven according to brownie package.
  • Mix brownie batter according to package directions. Adding in the mini chocolate chips. Set aside.
    1 box 9x13 size fudge brownie mix + plus ingredients from directions, 2 Tablespoons mini semi sweet chocolate chips
  • Grease a 9x13 pan or use parchment paper.
  • Pour brownie batter into pan.
  • Add peanut butter to microwave safe bowl and heat on high 30 seconds. Add powdered sugar. Whisk until smooth.
    ยผ cup powdered sugar, 1 cup peanut butter
  • Drop by spoonfuls onto brownie batter and gently swirl with knife.
  • Bake according to directions then cool completely on wire rack. Slice gently using plastic fork.

Nutrition

Calories: 340kcal | Carbohydrates: 42g | Protein: 7g | Fat: 17g | Saturated Fat: 4g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 8g | Trans Fat: 0.002g | Cholesterol: 0.1mg | Sodium: 217mg | Potassium: 135mg | Fiber: 1g | Sugar: 27g | Vitamin A: 1IU | Calcium: 12mg | Iron: 2mg

  • Stack of Carmelitas bars served with a glass of milk showing gooey caramel and chocolate layers.
    Carmelitas
  • Overhead view of stacked Cadbury Egg cookie bar squares with visible chocolate chips and candy pieces.
    Cadbury Egg Cookie Bars
  • Stack of peanut butter cup cookies showing the chocolate peanut butter cup centers.
    Peanut Butter Cup Cookies
  • Decorated Valentine sugar cookies with pink and red icing arranged on a red plate.
    Valentine Sugar Cookies

Comments

  1. theresa crossland says

    July 22, 2025 at 6:36 pm

    5 stars
    This is my favorite brownie!

    Reply
    • Misty Tannery says

      July 23, 2025 at 10:31 am

      So glad to hear that! It is one of mine too!

      Reply

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Misty Tannery-Learned it from My Mom Profile

Thank you for being here! Iโ€™m a home cook and food blogger sharing easy, delicious recipes made with loveโ€”just like my mom taught me! From quick weeknight dinners to sweet Southern desserts, I post new recipes daily to keep your kitchen inspired. Follow for family favorites, holiday treats, and everyday meals youโ€™ll actually want to make!

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