Dave'S Chocolate Fudge
["3 c. sugar", "3 Tbsp. butter", "3 Tbsp. dark corn syrup", "3 sq. unsweetened chocolate *", "6 oz. or 3/4 c. evaporated milk", "1/2 tsp. vinegar", "1 tsp. vanilla", "dash of salt"]
["Blend ingredients together and boil to soft ball stage.", "Cool and add vanilla.", "Pour into a 9 x 9-inch pan."]
["sugar", "butter", "corn syrup", "unsweetened chocolate", "milk", "vinegar", "vanilla", "salt"]