1 teaspoon salt
2 tablespoons cocoa powder
11 ounces dark chocolate, coarsely chopped
1 cup (8 ounces) unsalted butter, cut into 1-inch pieces
1½ cups granulated sugar
½ cup packed light brown sugar
5 eggs, at room temperature
2 teaspoons vanilla extract
2 2/3 cups confectioners' sugar, sifted
1/3 cup half-and-half cream
1 1/2 teaspoons vanilla
2. Blend in the cocoa powder (the amount desired for a light, medium or dark flavor), vanilla, confectioners sugar, alternately with the cream.
3. Beat with an electric mixer, until the desired texture is achieved.