
Crispy lace edges, molten American, brioche steam-bath.
Divide beef into 4 loose balls. Do not season yet. Toast the brioche cut sides in butter until deep gold.
Get a heavy skillet or plancha ripping hot. Add a beef ball and smash flat with a stiff spatula, pressed for 10 seconds.
Season immediately. Cook 90 seconds until deep crust forms, flip, top with cheese and cook 30 seconds more.
Stack two patties per bun. Add sauce, pickles and iceberg. Close and press gently so everything gets to know each other.
Eat immediately, standing up, over a plate.