- 12 tablespoons butter (1 1/2 sticks)
- 8 ounces unsweetened chocolate
- 1 1/3 cup all-purpose flour
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 2 cups sugar
- 4 large eggs
- 2 teaspoons vanilla extract
- Confectioners' sugar, for dusting, if desired
Pre-heat the oven to 350°F. Line a 9-inch x 13-inch baking pan with foil and spray the foil with nonstick cooking spray.
Melt the butter and chocolate in microwave-safe bowl and in the microwave, stirring frequently to avoid scorching. Stir until the chocolate and butter are completely melted. Whisk together the flour, baking powder and salt and set aside.
In a medium size bowl, whisk together the sugar, eggs, and vanilla extract. Whisk until pale and thick. Pour the chocolate mixture into the egg mixture. Whisk until completely incorporated. Add the flour mixture all at once and whisk to incorporate. Pour into the prepared pan and bake for 25-30 minutes, or until a skewer inserted in the center comes out clean. Let cool and dust with confectioners' sugar, if desired.