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These Fudgy Peanut Butter Swirl Brownies are SO delicious, you might cry. They’re a rich and decadent brownie recipe topped with a gooey peanut butter. Once baked they’re so fudgy and peanut buttery you’ll have to eat more than one.

stacked black and yellow swirl brownies


BEST Peanut Butter Swirl Brownies

I mean…peanut butter. And brownies. Is there anything better? Peanut butter brownies are epic!

This is my standard brownie recipe that I’ve been using for about a year now. You can make them in a 9×13″ pan for a thinner brownie, or in a 9×9″ pan for a thicker and extra super fudgy brownie.

stacked black and yellow swirl brownies

Peanut Butter Brownies Ingredients

  • The recipe includes three kinds of chocolate: melted unsweetened and semi-sweet, and cocoa powder. You can use regular cocoa powder, or you can use Dark Cocoa Powder. If you’ve never used Dark – DO IT. It gives it such a rich and fudgy flavor, seriously you’ll cry.
  • Lots of butter keeps them moist and rich.
  • Eggs give brownies that fudgy gooey texture.
  • Peanut Butter – the peanut butter mixture is swirled on top the brownies. Be sure to use a no-stir (not natural) peanut butter.

Click to see the recipe card below for full ingredients & instructions!

How to make Peanut Butter Swirl Brownies

  • First you’ll make the brownies by mixing all the ingredients in a large bowl. Place the batter into the pan.
  • The peanut butter topping is simple to make. It’s made with powdered sugar, peanut butter, butter, and vanilla. The peanut butter mixture by itself tastes like a peanut butter cup.
  • Swirl the peanut butter on top and then bake the brownies in a preheated oven.
stacked black and yellow swirl brownies

This is such a great all-purpose brownie recipe – without the peanut butter you can frost them with orange frosting, or coconut frosting. You can stuff them with Oreos or make them into truffles. This is the BEST brownie recipe!

stacked black and yellow swirl brownies

Peanut Butter Swirl Brownies Recipe

4.26 from 27 votes
Rich and fudgy brownies with a peanut butter swirl! These are some serious brownies!
Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour
Yield 16 brownies
Serving Size 1 serving

Ingredients
 

For the Brownies

  • 4 ounces (113g) unsweetened baking chocolate coarsely chopped
  • ¾ cup (170g) unsalted butter
  • 1 ½ cups (300g) granulated sugar
  • ½ teaspoon salt
  • 3 large eggs
  • 1 teaspoon vanilla extract
  • 2 tablespoons (10g) Dutch-process cocoa powder (or regular unsweetened)
  • 1 cup (124g) all-purpose flour

For the peanut butter swirl:

  • ½ cup 133g) peanut butter
  • 2 tablespoons (28g) unsalted butter melted
  • cup (38g) powdered sugar
  • 1 teaspoon vanilla
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Instructions

  • Preheat oven to 350F. Line a 9×9” pan with foil and spray with cooking spray.
  • Place baking chocolate and butter in a large, microwave safe bowl. Heat on HIGH power for 2-3 minutes, stirring every 30 seconds, until chocolate is smooth. Stir in sugar. Add eggs, vanilla, and cocoa and stir well. Add flour and stir carefully. Spread batter in prepared pan.
  • Stir together peanut butter, melted butter, powdered sugar, and vanilla. Drop spoonfuls on top of the brownies then swirl with a butter knife or the back of a wooden spoon.
  • Bake about 28-30 minutes, until the center seems set. Let cool before cutting. These brownies, baked this way, will be super gooey inside. If you like your brownies more done and less gooey, bake them longer.

Recipe Notes

  • You can use Dutch-process or regular unsweetened cocoa powder
  • This recipe has only been tested with shelf stable (not natural) peanut butter.
  • Store in an airtight container at room temperature for up to 4 days or you can freeze them.

Recipe Nutrition

Serving: 1serving | Calories: 304kcal | Carbohydrates: 36g | Protein: 5g | Fat: 19g | Saturated Fat: 9g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 6g | Trans Fat: 0.4g | Cholesterol: 62mg | Sodium: 124mg | Potassium: 130mg | Fiber: 2g | Sugar: 24g | Vitamin A: 362IU | Calcium: 20mg | Iron: 2mg
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American

Brownie Recipes



Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

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99 Comments

  1. What a CREEEPER!! I would totally freak out, but yes at least you had these to come home to. Seriously these look so rich and fudgy and the peanut butter topping- when you said its like a pb cup I just about died and had to clean off all the drool on my laptop!!

  2. Peanut butter + chocolate = love. These are mouthwatering, Dorothy! Thanks for sharing this recipe and the great giveaway!

  3. Haha – I would have totally thought the same thing! What a weirdo…

    These brownies look downright dangerous!

  4. First off, holy scary incident! I totally would have thought the same thing! Secondly, I feel like once my face experiences the deliciousness that is these Fudgy Peanut Butter Swirl Brownies, my life will be complete.