Double Decker Fudge
["2 c. Reese's peanut butter chips (12 oz. pkg.), divided", "1/4 c. butter, melted", "1/2 c. Hershey cocoa", "1 tsp. vanilla", "4 1/2 c. sugar", "1 (7 oz.) jar Marshmallow Creme", "1 1/2 c. evaporated milk (12 oz. can)", "1/4 c. butter"]
["Line a 13 x 9 x 2-inch pan with foil.", "Place 1 cup peanut butter chips in medium bowl; set aside."]
["butter chips", "butter", "cocoa", "vanilla", "sugar", "Marshmallow Creme", "milk", "butter"]