5 ounces semisweet or bittersweet chocolate, chopped 2 ounces unsweetened chocolate, chopped 8 tablespoons (1 stick) unsalted butter, cut into
quarters 3 tablespoons cocoa powder (either
Dutch - processed or natural cocoa works well in this recipe) 3 large eggs 1 1/4
cups granulated sugar 2 teaspoons vanilla extract 1/2 teaspoon salt 1
cup unbleached all - purpose flour