Hot Fudge Sauce
["1 c. sugar", "2 Tbsp. cocoa", "2 Tbsp. cornstarch", "1 c. hot water", "1/2 c. butter or margarine"]
["Mix sugar, cocoa and cornstarch; add hot water.", "Place in top of double boiler, bring to boil, stirring constantly.", "Cook 2 or 3 minutes until thick.", "Remove and cool slightly; add margarine or butter.", "Keep warm."]
["sugar", "cocoa", "cornstarch", "water", "butter"]