Ingredients

2 1/4 cups confectioners' sugar 

1/4 cup unsweetened cocoa powder 

Pinch of salt 

6 ounces cream cheese, room temperature 

1 1/2 sticks unsalted butter, softened 

9 ounces bittersweet chocolate, melted and cooled slightly 

3/4 cup creme fraiche, or sour cream 

Preparation

Sift together sugar, cocoa, and salt.

Beat cream cheese and butter with a mixer on medium-high speed until smooth. Reduce speed to medium-low; gradually add sugar-cocoa mixture, and beat until combined. Pour in chocolate in a slow, steady stream. Add creme fraiche; beat until combined.