2 c. white sugar
2 c. brown sugar
2/3 c. milk
1 18 oz. jar peanut butter
1 18 oz. jar marshmallow fluff

Heat sugars and milk until it comes to a rolling boil. Cook until a soft ball is formed when dropped into a glass of cold water (approximately 10 minutes). Remove from heat, add peanut butter and marshmallow fluff. Beat until smooth. Put into a 9x13 pan.