Foolproof Dark Chocolate Fudge
["3 c. (1 1/2 twelve oz. bags) Hershey's semi-sweet chocolate chips", "1 (14 oz.) can sweetened condensed milk", "dash of salt", "1 1/2 tsp. vanilla"]
["In heavy saucepan over low heat, melt chips with sweetened condensed milk and salt.", "Remove from heat; stir in walnuts and vanilla.", "Spread evenly into wax paper-lined 8 or 9-inch square pan.", "Chill 2 hours or until firm.", "Turn fudge onto cutting board; peel off paper and cut into squares.", "Store loosely covered at room temperature."]
["chocolate chips", "condensed milk", "salt", "vanilla"]