1 c. sugar
3 tbsp. cornstarch
Dash of salt
2 oz. unsweetened chocolate, grated
1 c. boiling water
3 tbsp. butter
1 tsp. vanilla

Mix sugar and cornstarch; add chocolate and salt. Add boiling water. Cook until mixture thickens. Remove from heat. Add butter and vanilla. Spread hot frosting on cooled cake for a glossy look. Remains soft and smooth.