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Ultra Fudgy Peanut Butter Swirl Brownies

A single, fudgy square of peanut butter swirl brownies showing rich chocolate base and marbled peanut butter topping.
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Make rich, fudgy brownies with a creamy peanut butter swirl. This recipe delivers decadent, bakery-style results using simple techniques for a perfect marbled treat.

Ingredients

Scale
  • 1/2 cup (115g) unsalted butter, melted
  • 1 cup (200g) granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1/3 cup (40g) unsweetened cocoa powder
  • 1/2 cup (65g) all-purpose flour
  • 1/4 teaspoon salt
  • 1/4 teaspoon baking powder
  • 1/2 cup (120g) creamy peanut butter (for swirl)
  • 2 tablespoons powdered sugar (for swirl)
  • 1 tablespoon milk (for swirl)

Instructions

  1. Preheat your oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a medium bowl, whisk together the melted butter and granulated sugar until combined.
  3. Whisk in the eggs one at a time until incorporated. Stir in the vanilla extract.
  4. In a separate small bowl, whisk together the cocoa powder, flour, salt, and baking powder.
  5. Gradually add the dry ingredients to the wet ingredients, mixing only until just combined. Do not overmix; a few streaks of flour are acceptable for fudgy texture.
  6. Pour about two-thirds of the brownie batter into the prepared pan and spread evenly.
  7. Prepare the peanut butter swirl mixture: In a small bowl, combine the creamy peanut butter, powdered sugar, and milk. Stir until smooth and creamy.
  8. Drop spoonfuls of the peanut butter mixture over the brownie batter in the pan.
  9. Pour the remaining one-third of the chocolate batter over the peanut butter dollops.
  10. Create the swirl: Use a butter knife or a thin offset spatula to gently cut through the layers in an S-pattern or figure-eight motion across the top of the batter. Do not over-swirl, or the colors will blend completely.
  11. Bake for 25 to 30 minutes. The edges should look set, and a toothpick inserted near the center should come out with moist crumbs attached, not wet batter.
  12. Let the brownies cool completely in the pan on a wire rack before lifting them out using the parchment overhang and cutting them into squares.

Notes

  • For the best fudgy texture, avoid overbaking. The center should still look slightly underdone when you remove them from the oven.
  • If your peanut butter is very stiff, microwave the swirl mixture for 10 seconds to make it easier to drop onto the batter.
  • To achieve bakery-style brownies, chill the cooled brownies for at least one hour before slicing.

Nutrition

Find it online: https://fooddexterity.com/peanut-butter-swirl-brownies/