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Ultra Fudgy Peanut Butter Swirl Brownies

Two rich, fudgy peanut butter swirl brownies stacked on a white plate, showing the gooey peanut butter marbling.
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Make rich, fudgy brownies with a distinct, creamy peanut butter ribbon throughout. This scratch recipe delivers a perfect glossy top and decadent flavor.

Ingredients

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  • 1 cup (2 sticks) unsalted butter, melted
  • 1 3/4 cups granulated sugar
  • 1 cup packed light brown sugar
  • 4 large eggs
  • 1 tablespoon vanilla extract
  • 3/4 cup unsweetened cocoa powder
  • 1 cup all-purpose flour
  • 1 teaspoon salt
  • 1/2 teaspoon baking powder
  • 1 cup semi-sweet chocolate chips
  • 1 cup creamy peanut butter, slightly warmed

Instructions

  1. Preheat your oven to 350 degrees F. Line a 9×13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a large bowl, whisk together the melted butter, granulated sugar, and brown sugar until smooth.
  3. Beat in the eggs one at a time until fully incorporated. Stir in the vanilla extract.
  4. In a separate bowl, whisk together the cocoa powder, flour, salt, and baking powder. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.
  5. Stir in the chocolate chips.
  6. Pour about two-thirds of the brownie batter into the prepared pan and spread evenly.
  7. Warm the peanut butter slightly so it is easily pourable. Drizzle the warmed peanut butter over the batter in random lines.
  8. Dollop the remaining one-third of the brownie batter over the peanut butter layer.
  9. Use a knife or skewer to gently swirl the peanut butter and chocolate layers together to create a marbled effect. Do not over-swirl.
  10. Bake for 30 to 35 minutes. The edges should look set, and a toothpick inserted near the center should come out with moist crumbs attached, not wet batter.
  11. 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

  • Warming the peanut butter briefly in the microwave (about 15-20 seconds) makes it easier to drizzle and swirl into the batter.
  • For the best fudgy texture, avoid overbaking. Err on the side of underbaking slightly.
  • If you prefer a thicker brownie, use an 8×8 inch pan instead, but increase the baking time by about 10-15 minutes.

Nutrition

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