Over low heat, bring sugar, cocoa, and milk to boil. Cook until thickened. Remove from heat. Add margarine and vanilla, beat by hand until margarine is melted. Pour candy on buttered plate. Candy will harden as it sits.
Nutritional Information:
723 Calories (kcal); 11g Total Fat; (12% calories from fat); 6g Protein; 162g Carbohydrate; 12mg Cholesterol; 116mg Sodium