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Gluten-Free Chocolate Peanut Butter Swirl Brownies

Two stacked squares of rich Gluten-Free Chocolate Peanut Butter Swirl Brownies showing the dense texture and peanut butter swirl.

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Make rich, fudgy brownies that are completely gluten-free and feature a decadent peanut butter swirl topping.

Ingredients

Scale
  • 1 cup (2 sticks) unsalted butter, melted
  • 1 1/2 cups granulated sugar
  • 1 cup packed light brown sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup gluten-free all-purpose flour blend (with xanthan gum)
  • 3/4 cup unsweetened cocoa powder
  • 1/2 teaspoon salt
  • 1/2 cup semi-sweet chocolate chips
  • 1 cup creamy peanut butter, slightly warmed
  • 1/4 cup powdered sugar
  • 1 tablespoon milk or water

Instructions

  1. Preheat your oven to 350°F (175°C). Grease and 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 combined.
  3. Beat in the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
  4. In a separate bowl, whisk together the gluten-free flour blend, cocoa powder, and salt.
  5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix. Fold in the chocolate chips.
  6. Pour the brownie batter into the prepared pan and spread evenly.
  7. In a small bowl, mix the warmed peanut butter, powdered sugar, and milk or water until smooth and pourable.
  8. Drop spoonfuls of the peanut butter mixture evenly over the brownie batter.
  9. Use a knife or skewer to gently swirl the peanut butter mixture into the batter. Do not over-swirl, or the colors will blend completely.
  10. Bake for 30 to 35 minutes. A toothpick inserted near the edge should come out with moist crumbs, not wet batter.
  11. Let the brownies cool completely in the pan on a wire rack before lifting them out using the parchment paper overhang and cutting into squares.

Notes

  • For the best swirl, slightly warm the peanut butter mixture so it flows easily over the batter.
  • If your gluten-free flour blend does not contain xanthan gum, add 1/2 teaspoon to the dry ingredients.
  • For extra fudginess, use a dark chocolate cocoa powder.

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