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Decadent Fudgy One-Bowl Peppermint Brownies with Peppermint Frosting

Close-up of fudgy peppermint brownies stacked, topped with white frosting and crushed candy canes.

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Make these rich, fudgy peppermint brownies easily in one bowl. Top them with a creamy peppermint frosting and crushed candy canes for a perfect holiday dessert.

Ingredients

Scale
  • 1 cup (2 sticks) unsalted butter, melted
  • 2 cups granulated sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1/2 cup unsweetened cocoa powder
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt
  • 1/2 teaspoon baking powder
  • 1 teaspoon peppermint extract (for batter)
  • 1/2 cup semi-sweet chocolate chips
  • 1/2 cup crushed peppermint candies or candy canes (for batter)
  • For the Frosting:
  • 1/2 cup (1 stick) unsalted butter, softened
  • 3 cups powdered sugar, sifted
  • 1/4 cup milk or heavy cream
  • 1 teaspoon peppermint extract (for frosting)
  • 1/4 teaspoon red food coloring (optional)
  • 1/2 cup crushed peppermint candies (for topping)

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides for easy removal. Lightly grease the paper.
  2. In a large bowl, whisk the melted butter and granulated sugar together until combined.
  3. Whisk in the eggs one at a time until fully incorporated. Stir in the vanilla extract and 1 teaspoon of peppermint extract.
  4. Add the cocoa powder, flour, salt, and baking powder to the wet ingredients. Mix with a spatula until just combined. Do not overmix; stop when no streaks of flour remain.
  5. Fold in the chocolate chips and the 1/2 cup of crushed peppermint candies into the batter.
  6. Spread the batter evenly into the prepared baking pan.
  7. Bake for 25 to 30 minutes. A toothpick inserted near the center should come out with moist crumbs attached, not wet batter, for fudgy results.
  8. Let the brownies cool completely in the pan on a wire rack. This is important before frosting.
  9. Prepare the frosting: In a medium bowl, beat the softened butter until creamy. Gradually add the powdered sugar, alternating with the milk, until smooth. Beat in the 1 teaspoon of peppermint extract and red food coloring, if using.
  10. Spread the peppermint frosting evenly over the cooled brownies.
  11. Sprinkle the remaining 1/2 cup of crushed peppermint candies over the frosting.
  12. Allow the frosting to set slightly before cutting into squares. Use the parchment paper overhang to lift the entire block of brownies out before slicing.

Notes

  • For the fudgiest texture, slightly underbake the brownies by 2-3 minutes.
  • If you want a peppermint bark look, melt 1/2 cup of white chocolate chips and drizzle it over the crushed candy canes after the frosting is set.
  • Use high-quality cocoa powder for the best chocolate flavor in these chocolate mint brownies.

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