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Matcha and White Chocolate Mousse Brownies

2023-02-20 - Written by: Emma Taylor

brownies matcha white chocolate dessert

Matcha and White Chocolate Mousse Brownies

Rich, fudgy brownies infused with the brightness of matcha green tea and the sweetness of white chocolate mousse.

Matcha and White Chocolate Mousse Brownies

Servings

24-30 square brownies

Ingredients

For the brownies

  • 1 and 1/2 sticks unsalted butter (12 tablespoons), plus more for greasing the pan
  • 2 cups sugar
  • 4 large eggs
  • 1/2 cup unsweetened cocoa powder
  • 1 teaspoon matcha powder
  • 1 teaspoon vanilla extract
  • 1 and 1/4 cups all-purpose flour
  • 1 teaspoon salt
  • 1 cup semi-sweet chocolate chips

For the white chocolate mousse

  • 8 ounces high-quality white chocolate, broken into small pieces
  • 1 cup heavy cream
  • 2 large egg whites
  • 1 tablespoon granulated sugar

Instructions

Make the brownies

  1. Preheat your oven to 350°F (180°C). Grease an 8-inch square baking pan and line it with parchment paper.
  2. In a medium bowl, whisk together the flour, salt, and matcha powder. Set aside.
  3. Melt the butter and sugar in a large saucepan over low heat, stirring occasionally. Once melted, bring to a simmer and cook for 5 minutes, until the mixture reaches 240°F on a candy thermometer.
  4. Remove from the heat and stir in the cocoa powder until it's well combined. Let cool slightly.
  5. Stir in the flour mixture, followed by the eggs one at a time, then the vanilla extract.
  6. Melt the chocolate chips in a double boiler or in the microwave in 30-second increments, stirring between each interval. Once melted, stir into the brownie batter.
  7. Pour the batter into the prepared pan and smooth the top.
  8. Bake for 25-30 minutes, until a toothpick inserted 2 inches from the pan's edge comes out with a few moist crumbs.

Make the white chocolate mousse

  1. In a small saucepan over medium heat, warm the heavy cream until it's hot but not boiling.
  2. Remove from the heat and pour over the white chocolate in a heatproof bowl. Let sit for 2 minutes, then stir until smooth.
  3. Stir in the egg whites and granulated sugar.

Assemble the brownies

  1. Allow the brownies to cool completely in the pan.
  2. Once cooled, use a serrated knife to level off the top of the brownies, if necessary.
  3. Spread the white chocolate mousse over the top of the cooled brownies.
  4. Refrigerate for at least 30 minutes to allow the mousse to set.

Tips and Variations

  • For an extra-fudgy texture, bake the brownies for 23-25 minutes instead of 25-30 minutes.
  • If you prefer a lighter matcha flavor, use less matcha powder or omit it altogether.