2/3 c. Hershey's cocoa
1/8 tsp. salt
1 1/2 c. milk
3 c. sugar
4 1/2 tbsp. butter
1 tsp. vanilla

Combine cocoa with sugar and salt. Add milk and bring to a boil, stirring frequently. Cook to 232 degrees or until a small amount of mixture forms a soft ball when dropped in cold water. Remove from heat; drop in butter. Cool to lukewarm 110 degrees. Add vanilla and beat until mixture thickens. Pour into buttered pan and cut in squares.