Ingredients:

  • 1 cup (225g) unsalted butter, cut into cubes
  • 1 cup (200g) granulated sugar
  • 1 cup (220g) packed light brown sugar
  • 3 large eggs
  • 1 teaspoon (5ml) vanilla extract
  • 1 cup (120g) all-purpose flour
  • ¾ cup (75g) unsweetened cocoa powder
  • ½ teaspoon (3g) baking powder
  • ¼ teaspoon (1.5g) salt
  • 6 ounces (170g) semi-sweet chocolate chips
  • 4 tablespoons (57g) unsalted butter, softened
  • 2 cups (240g) powdered sugar
  • 2 tablespoons (30ml) milk
  • ½ teaspoon (2.5ml) peppermint extract
  • Green food coloring (optional, a few drops)
  • 4 ounces (113g) semi-sweet chocolate, chopped
  • ¼ cup (60ml) heavy cream

Instructions:

  1. Preheat oven to 350°F (175°C). Line a 9x13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a large bowl, melt the butter with both sugars in microwave until completely smooth or in the oven until a spoon runs through it and smooth. Stir or whisk until combined, smooth and no lumps of sugar are visible.
  3. Add 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, baking powder, and salt.
  5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix.
  6. Fold in the chocolate chips.
  7. Pour the brownie batter into the prepared pan and spread evenly. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with moist crumbs attached.
  8. While the brownies are baking, make the mint layer. In a medium bowl, beat the softened butter with an electric mixer until smooth. Gradually add the powdered sugar, alternating with the milk, until a smooth and creamy frosting forms. Stir in the peppermint extract and green food coloring (if using).
  9. Let the brownies cool completely in the pan before frosting.
  10. Once the brownies are cooled, spread the mint frosting evenly over the top.
  11. Heat the heavy cream in a small saucepan until just simmering. Pour over the chopped chocolate and let it sit for a minute. Whisk until smooth and glossy.
  12. Drizzle or spread the chocolate ganache over the mint layer.
  13. Chill the brownies for at least 30 minutes before cutting into squares. This will help the frosting set and make them easier to cut.