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Peanut Butter Swirl Brownies

Peanut butter swirl brownies on a blue cake stand.

Peanut butter swirl brownies are divine, moist, chewy, and decadent. The recipe is super simple to make and is very versatile.

The dessert brownies are a combination of a fudgy, chocolatey center and a crunchy flaky top, with a streak of flavorful peanut butter throughout.

And the best part is that is isn’t hard to make, everyone will be wanting some–and there’s plenty to go around.

The hardest part of this recipe is waiting for them to cool and slice. And, I have to admit that we take some of the brownies out before they cool off because there’s nothing better than a warm chocolate peanut butter brownie.

Peanut butter brownies stacked on top of each other.

What Ingredients Do I Need For the Peanut Butter Brownie Recipe?

  • Butter, melted
  • Sugar
  • Vanilla extract
  • Eggs
  • All-purpose flour
  • Unsweetened cocoa
  • Salt
  • Chocolate chips
  • Peanut Butter

Full printable recipe with measurements and instructions at the bottom of the post.

Brownies sliced in a baking dish.

How Do I Make Peanut Butter Brownies?

  1. Start by sifting the flour, unsweetened cocoa, and salt. Set the bowl aside.
  2. Next, add the sugar and melted butter to a large bowl and mix well.
  3. Add the vanilla extract and eggs, one-at-a-time, and mix well.
  4. Pour in the flour mixture and mix.
  5. In a small bowl, add the chocolate chips and one teaspoon of flour, and toss.
  6. Add the chocolate chips to the brownie batter and mix.
  7. Pour the batter into the baking dish.
  8. In another bowl melt the peanut butter in the microwave and pour over the brownie batter.
  9. Take a knife and run it through the batter.
  10. Bake for approximately 35-minutes or until a cake tester comes out clean.

Peanut Butter Swirl Brownies

Cocoa, sugar, and salt in a glass bowl.

Start by adding the flour, unsweetened cocoa, and salt to a sifter.

Cocoa, sugar, and flour in a glass bowl.

Sift the ingredients into a bowl and set it to the side.

You’ll be using this in a few steps.

Sugar in a glass bowl.

In a large bowl, add the sugar.

Pouring melted butter into a glass bowl with sugar.

Next, add the melted butter and mix the two ingredients.

Part of the reason you’re mixing the two ingredients together is that you’ll be adding eggs. If you add eggs to the melted butter, you’ll cook them, so mixing the sugar first will help avoid that.

Butter, sugar, and vanilla extract mixed together in a glass bowl.

Vanilla extract is the next ingredient.

Mixing eggs, butter, flour, and sugar with a hand mixer.

Add the eggs to the bowl, one-at-a-time, and mix well.

Cocoa, sugar, and flour in a glass bowl

Pour the flour and cocoa mixture into the bowl and mix well.

Chocolate chips in a small bowl with flour

In a small bowl, add the chocolate chips and a tablespoon of flour. Toss the chocolate chips and then mix them into the batter.

TIP: The flour will help keep the chocolate chips from sinking in the brownie batter.

Brownie batter in a casserole dish

Spread the brownie batter into a greased 13″ x 9″ baking dish.

Pouring melted peanut butter over brownies

In another bowl, melt the peanut butter in the microwave, for about 30-seconds, and pour over the brownies.

Peanut butter swirled over brownies

Take a knife and run it through the brownie batter to give them a swirl look. Bake the brownies for 35 minutes or until a cake tester comes out clean.

Brownies sitting on a blue cake stand.
Peanut butter swirl brownies sitting on a blue cake stand.

If you love these peanut butter swirl brownies, try these desserts:

Recipe Card

Check out the peanut butter swirl brownie recipe below, grab those ingredients, and start baking! This is a delicious treat that everyone will love.

Then, share your comments below and share a picture of your brownies on the Pinterest Pin!  If you made any changes or added something different, be sure to share it with us so we can try it, too!

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Yield: 36

Peanut Butter Swirl Brownies

Peanut butter brownies stacked on top of each other.

Peanut butter swirl brownies are absolutely divine, moist, chewy, and decadent. The recipe is super simple to make and is very versatile.

Prep Time 15 minutes
Cook Time 35 minutes
Additional Time 30 minutes
Total Time 1 hour 20 minutes

Ingredients

  • 2 sticks butter, melted
  • 3 cups sugar
  • 1 Tbsp. vanilla extract
  • 4 eggs
  • 1-1/2 cups all-purpose flour
  • 1 cup unsweetened cocoa
  • 1-1/4 tsp. salt
  • 1 cup chocolate chips
  • 1-1/2 cups of creamy peanut butter, melted

Instructions

  1. Preheat oven to 350-degrees and grease a 9" x 13" baking dish.
  2. Sift the flour, cocoa, and salt, and set aside.
  3. In a large bowl, add the sugar and melted butter and mix.
  4. Next, add the vanilla extract, and eggs, one at a time and mix.
  5. Add the flour mixture and mix well.
  6. In a small bowl, add the chocolate chips and teaspoon of flour and toss. Add the chocolate chips to the batter and mix well.
  7. Pour the batter into the baking dish.
  8. In another bowl, add the peanut butter and melt in the microwave for about 30 seconds. Add more time, in increments of 10 seconds, if needed.
  9. Pour the peanut butter over the brownie batter and run a knife through to create the swirls.
  10. Bake for 35 minutes or until the cake tester comes out clean.
  11. Cool for about 30 minutes before slicing.

Nutrition Information:

Yield:

36

Serving Size:

1

Amount Per Serving: Calories: 260Total Fat: 14gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 7gCholesterol: 34mgSodium: 376mgCarbohydrates: 30gFiber: 2gSugar: 20gProtein: 5g

Nutrition is approximate.

Did you make this recipe?

Please leave a comment on the blog or share a photo on Pinterest

Find more delicious recipes at Julia’s Simply Southern and South Your Mouth.

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