Ingredients

1/2 cup sugarSugar substitute equivalent to 1/2 cup sugar1/2 cup baking cocoa3 tablespoons cornstarch1 cup cold water4-1/2 teaspoons butter1 teaspoon vanilla extract

Preparation

In a saucepan, combine the sugar, sugar substitute, cocoa and cornstarch. Add water and stir until smooth. Bring to a boil; cook and stir for 1 minute or until thickened. Remove from the heat; stir in butter and vanilla until smooth. Spread over cupcakes or cake while frosting is still warm.