Ingredients

The following ingredients have 16 Servings
  • 1 cup + 2 tablespoons unsalted butter
  • 9 ounces bittersweet chocolate (finely chopped)
  • 1¼ cups granulated sugar
  • 1 cup + 2 tablespoons light brown sugar
  • 4 eggs
  • 1 teaspoon vanilla extract
  • 2 cups all-purpose flour
  • 1 teaspoon baking powder
  • Pinch of salt
  • ½ cup white chocolate chips
  • ¼ cup milk chocolate chips
  • ¼ cup dark chocolate chips

Instruction

  • Preheat oven to 325 degrees F. Grease a 9-inch square baking pan and line with parchment paper; set aside.
  • Place the butter and chopped chocolate in a heatproof bowl set over a pan of barely simmering water. Stir occasionally until completely smooth and melted. Remove the bowl from the heat and allow to cool slightly.
  • Meanwhile, in a medium bowl, sift together the flour, baking powder and salt.
  • In a large bowl, whisk together the sugars, eggs and vanilla until completely smooth and there are no lumps of sugar. Add the melted chocolate mixture and whisk gently until thoroughly combined.
  • Add the flour mixture, white chocolate chips, milk chocolate chips and dark chocolate chips and, using a rubber spatula, fold into the chocolate batter until no streaks of flour remain.
  • Pour the batter into the prepared pan, smoothing it into an even layer. Bake for 45 minutes to 1 hour, until a crust has formed on top and a toothpick inserted into the center comes out covered in sticky crumbs.
  • Allow the brownies to cool completely in the pan, then slice into squares and serve. They can be stored at room temperature in an airtight container for up to 4 days, or wrapped individually and frozen for up to 1 month.