Preparation:
Combine sugar, cocoa, cornstarch and instant coffee in a medium saucepan. Gradually stir in the milk. Bring the mixture to a boil over medium heat stirring constantly, until it thickens. Remove from heat and stir in margarine and vanilla; keep stirring until margarine is melted. To serve, scoop 1/2 cup frozen yogurt into individual serving bowls, and top evenly with hot fudge sauce.
Preparation and heating time: 10 minutes |