Place a square of parchment paper on a chopping board, then place the meat ball on top of the paper.
Put another square of paper on top of the ball of meat and press down with the palm of your hand and squash until the patties are around ½ cm thick.
You can also use the underside of a saucepan to push the patty down.
You won’t have a perfectly round burger, but the imperfect edges will crisp up a little and this is what gives that Five Guys taste.
Place one of the burger patties on the bottom bun, then top with two slices of the processed cheese, adding the next patty on top of the cheese, before putting on the top bun.
Give the whole thing a good squish down with your hand.