1 (1 oz.) square Baker's unsweetened chocolate
1 c. sugar
1/4 c. butter
1/3 c. milk
1 tsp. vanilla

Melt chocolate and butter together over low heat. Add sugar and milk. Bring to a boil while constantly stirring. Boil 1 minute at a full boil. Add vanilla after removing from heat. Beat frosting by hand until of spreading consistency.