Cook the burgers using the regular hamburger recipe
and place one THIN slice of American cheese on the crown side before
adding meat patty. Don't use Kraft singles or Velveeta. (or anything
termed as "American processed cheese FOOD) Use only real American
cheese. That is KEY! Please Note****Most slices of American cheese
are too big for McDonald's® cheeseburgers. So take about 1/4" off
two edges to make a smaller square.