Ingredients
1/2 pound sifted confectioners' sugar
1/4 cup unsweetened Dutch-process cocoa powder
1/8 teaspoon salt
6 ounces cream cheese, softened
3 ounces (6 tablespoons) unsalted butter, softened
9 ounces bittersweet chocolate, melted
3/4 cup sour cream
Preparation
Sift sugar, cocoa powder, and salt into a large bowl. Beat cream cheese and butter with a mixer on medium-high speed until fluffy, about 4 minutes. Reduce speed to low. Beat in sugar mixture. Beat in chocolate, then sour cream. Use immediately, or cover and refrigerate for up to 3 days. (Bring to room temperature, and beat on low speed until smooth before using.)
