• Yield: Makes one 9-by-13-inch brownie

Source: Martha Stewart Kids, Spring 2006


  • 9 tablespoons unsalted butter, softened, plus more for pan
  • 9 ounces good-quality semisweet chocolate, coarsely chopped
  • 1/3 cup unsweetened Dutch-process cocoa powder
  • 1 cup all-purpose flour
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1 1/2 cups sugar
  • 3 large eggs
  • 1 tablespoon pure vanilla extract


  1. Preheat oven to 350 degrees. Butter 9-by-13-inch cake pan; line with parchment paper, allowing 2-inch overhang. Butter parchment. Put butter, chocolate, and cocoa in heatproof bowl set over pan of simmering water; stir until butter and chocolate have melted. Let cool slightly.

  2. Whisk flour, baking powder, and salt in medium bowl. Put sugar, eggs, and vanilla into mixer bowl; whisk on medium until pale, about 4 minutes. Mix in chocolate mixture. Reduce speed to low. Add flour mixture; mix until just combined.

  3. Spread batter into prepared dish; smooth top. Bake until a cake tester inserted into center comes out with only a few moist crumbs attached, 35 to 40 minutes. Let cool in dish 40 minutes. Lift out, and let cool completely on wire rack.


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