01 - Divide the ground beef into four equal portions and flatten each into a patty about 1/3 inch thick.
02 - Season both sides of each patty generously with kosher salt and freshly ground black pepper.
03 - Heat a skillet or grill over medium-high heat and add butter or neutral oil.
04 - Place patties in the hot skillet. Cook for 2-3 minutes per side until browned and cooked through.
05 - During the final minute of cooking, place a slice of cheese on top of two patties and let melt completely.
06 - Stack one cheese-topped patty with a plain patty, cheese side facing down, to create two double-patty stacks with cheese sandwiched between.
07 - Layer optional toppings including pickles, tomato, grilled onion, and lettuce between the patties if desired.
08 - Serve hot while the cheese remains melted and the patties are at peak temperature.