Combine coffee granules and boiling water, stirring until dissolved; set aside.
Combine chocolate, butter, and salt in top of a double boiler. Cook over medium heat, stirring until smooth. Remove from heat; cool.
Stir in coffee mixture. Gradually add powdered sugar, beating at medium speed of electric mixer 1 minute or until mixture is smooth and creamy. Use immediately.
Oxmoor House Homestyle Recipes