The 4x4 is four thin beef patties and four slices of American cheese in a single bun, and the only real question it asks is whether the bun-to-beef logic that makes a one-patty burger work survives being multiplied by four. It does not, automatically; it has to be engineered to. A single thin griddled patty with a melted slice is a balanced thing: bun, crust, cheese, and a cool sharp frame in honest proportion. Stack four of each and the proportions invert. The bread no longer braces the meat; the meat dwarfs the bread, the structure gets tall and unstable, and the sandwich's whole problem becomes keeping a four-high tower bound and liftable instead of collapsing into a pile.
The craft is in the thinness and the interleaving. The patties are thin precisely because four thick ones would be a brick no jaw could compress and no bun could hold; thin patties keep the total height in range and give four times the seared crust, which is where the flavor is. The cheese is the structural fix as much as the flavor: a slice melted between every pair of patties laminates the stack into one mass instead of four loose disks that slide apart on the first bite. The order of assembly matters, cheese against beef at each layer so it fuses going up, and the bun is the same soft bun a single burger uses, which means it is now badly outmatched and depends entirely on the cheese lamination and a tight wrap to do the holding it cannot do alone. The cool frame, spread, lettuce, tomato, raw onion, is the same as on a small burger, which means at four patties it is proportionally thin and the sandwich tips rich and heavy in a way the single never does. This is the scaling limit of the smashed-griddle build made visible: the method works at one patty, strains at four, and the 4x4 is the sandwich that lives right at the edge of where the geometry stops cooperating.
It sits next to the home reconstruction of the same chain method and the smaller standard builds the 4x4 multiplies up from. Those are their own articles rather than being crowded in here.