If you're a fan of rich, fudgy chocolate brownies with a creamy twist, these Peanut Butter Swirl Brownies are a must-try! Where are all my peanut butter and chocolate lovers out there?! You’re going to absolutely love this irresistible dessert combo.
They’re incredibly easy to make because it starts with a brownie mix. Best of all, they’re the perfect easy dessert for potlucks, parties, or any time you're craving a sweet treat. Always a crowd-pleaser and guaranteed to disappear fast!

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!
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!

- Step 1: Combine all ingredients for brownie mix in bowl and stir well to combine

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

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

4. Step 4: Time for the fun part—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 3–4 days, as long as they’re tightly covered. Personally, I love to slightly warm mine up each time—it just makes them even more gooey and irresistible!

Other Yummy Treats
Peanut Butter Swirl Brownies
Ingredients
- 1 box 9x13 size fudge brownie mix + plus ingredients from directions
- 2 Tablespoons mini semi sweet chocolate chips
- 1 cup peanut butter
- ¼ 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.¼ 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.






theresa crossland says
This is my favorite brownie!
Misty Tannery says
So glad to hear that! It is one of mine too!