Butterfingers 1 cup granulated sugar 1/3 cup white corn syrup 1/2 cup water 1 cup peanut butter 3 Hershey chocolate candy bars Butter a 9-inch square pan. Cook sugar, corn syrup and water over medium heat until 305 degrees F on a candy thermometer. Stir in peanut butter. Pour into prepared pan. While still hot, put 3 Hershey bars on top and spread evenly. Refrigerate. When set, break into pieces.