01 -
Stir the mayonnaise, ketchup, mustard, pickle brine, garlic powder, and smoked paprika in a small bowl. Refrigerate while you cook the burgers.
02 -
Divide the cold ground beef into eight loose 3-ounce (85 g) balls. Keep the texture craggy and do not compress the meat tightly.
03 -
Heat a cast iron skillet or griddle over medium-high heat. Toast the buns cut-side down until golden, then set them aside.
04 -
Wipe the pan with a very thin layer of neutral oil. Increase the heat to high and let the pan get very hot, about 1-2 minutes.
05 -
Add two beef balls to the pan. Immediately press each one into a thin patty with a burger press or stiff metal spatula. Season with salt and pepper.
06 -
Cook without moving until the edges are deeply browned and lacy, about 90 seconds. Scrape firmly underneath each patty, flip, and season the second side lightly.
07 -
Top each patty with cheese and cook until melted and the beef reaches 160°F, about 30-45 seconds more.
08 -
Spread sauce on the buns. Stack two cheesy patties on each bottom bun, then add pickles, onion, and lettuce if using. Close the burgers and serve immediately.