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

Mix sugar and cornstarch; add chocolate and salt. Add water; cook until mixture thickens. Remove from heat; add butter and vanilla. Spread on cake while hot for a glossy frosting which remains soft and smooth. Especially good on angel or sponge cake. Also makes excellent topping for Hot Fudge Sundaes and you will probably want to double the recipe for this purpose.