Combine the first 4 ingredients for 6 minutes sugar salt butter and evaporated milk Bring to a boil Keep at a rolling boil over medium heat Do not stir Have a metal or glass bowl ready with the chocolate chips chocolate squares and Fluff Pour boiling syrup over this and stir until chocolate is melted Stir in vanilla and nuts Pour into buttered 9 x 13 pan Cool slightly then place in refrigerator to chill and become firm Cut into squares with sharp knife