Hot Fudge
["1 c. sugar", "1 1/2 tsp. cornstarch", "1/4 tsp. salt", "2 sq. chocolate", "1 c. boiling water", "1 tsp. butter or margarine", "1 tsp. vanilla"]
["Mix sugar, cornstarch and salt in saucepan.", "Add chocolate and boiling water and bring to boil until thickened.", "Add butter or margarine and vanilla."]
["sugar", "cornstarch", "salt", "chocolate", "boiling water", "butter", "vanilla"]