Prepare the Beef: Divide 1 pound of ice-cold ground beef into four equal portions, about 4 ounces each, without overworking it. Let them rest briefly while you prepare your skillet.

Heat the Skillet: Preheat a heavy-duty cast iron skillet over medium-high heat until it starts to lightly smoke. Add a small smear of oil to the pan.

Smash the Patty: Once the oil is shimmering, place two beef balls in the skillet and press down firmly to form thin, wide patties.

Season and Cook: Sprinkle kosher salt and black pepper generously over each patty. Cook undisturbed for about 2 minutes until browned, then flip.

Melt the Cheese: Immediately after flipping, stack two slices of cheese on each patty and cover the skillet for about 30 seconds to melt.

Assemble the Burger: Place one cooked patty atop the other and spread burger sauce on the bottom half of a toasted brioche bun.

Serve with Love: Place the top half of the brioche bun on the patties and serve immediately for the best experience.