Ingredients

12 ounces cream cheese, softened 

1 1/2 sticks unsalted butter, softened 

4 1/2 cups confectioners' sugar 

1/2 cup unsweetened cocoa powder 

Salt 

1 pound 2 ounces bittersweet chocolate, melted and slightly cooled 

1 1/2 cups creme fraiche or sour cream 

Preparation

Beat cream cheese and butter with a mixer on medium speed until pale and fluffy, about 3 minutes. Sift together sugar, cocoa powder, and 1/4 teaspoon salt; gradually beat into cream cheese mixture. With machine running, pour in melted chocolate in a slow, steady stream. Beat in creme fraiche until well combined. If frosting doesn’t seem firm enough, refrigerate for 10 minutes. Beat before using.