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Fudgy Peanut Butter Stuffed Brownies

A rich, fudgy square of peanut butter stuffed brownies showing the creamy peanut butter layer inside.

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Make decadent, fudgy brownies with a rich, creamy peanut butter core using this straightforward recipe. This method keeps the filling centered for a perfect bite every time.

Ingredients

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  • 1 cup (2 sticks) unsalted butter, melted
  • 1 3/4 cups granulated sugar
  • 3/4 cup packed light brown sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 3/4 cup unsweetened cocoa powder
  • 1/2 teaspoon salt
  • 1/4 teaspoon baking powder
  • 1 cup semi-sweet chocolate chips
  • 1 cup creamy peanut butter (not natural style)
  • 1/2 cup powdered sugar
  • 2 tablespoons unsalted butter, softened
  • 1 tablespoon milk

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×9 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. Whisk 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 flour, cocoa powder, 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. Prepare the peanut butter filling: In a medium bowl, beat together the peanut butter, powdered sugar, softened butter, and milk until smooth and creamy.
  7. Spread half of the brownie batter into the prepared pan.
  8. Drop spoonfuls of the peanut butter filling evenly over the batter layer.
  9. Gently spread the remaining brownie batter over the peanut butter layer, covering it completely.
  10. Bake for 30 to 35 minutes. A toothpick inserted near the edge should come out with moist crumbs, but the center should still look slightly underdone for fudginess.
  11. Let the brownies cool completely in the pan on a wire rack before lifting them out using the parchment overhang and cutting into squares.

Notes

  • Use creamy peanut butter for the best stuffing consistency; natural peanut butter may separate or become oily.
  • For clean cuts, chill the cooled brownies for at least one hour before slicing.
  • If you prefer a thicker peanut butter layer, increase the filling ingredients by 50% and ensure the top batter layer is spread thinly.

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