-
Mix the butter, Worcestershire sauce, fish sauce, and smoked paprika in a small bowl. In a larger bowl, place the ground beef and pour the sauce over. Mix with your hands to get it well-distributed through the meat. Form into 4 balls. Place the balls in the fridge for 20-30 minutes while you prep everything else.
-
Butter the buns and toast them on your skillet or griddle until golden.
-
Prep the toppings and house sauce (see notes).
-
Cut a small piece of parchment paper that you’ll use on top of the burgers to prevent sticking.
-
Heat a cast iron skillet or flat griddle until it’s very hot; place a few of the burgers on the hot surface. Sprinkle them with a big pinch of salt and let them sit and sizzle for about 20 seconds.
-
Place the parchment paper on top of each burger and then, using a heavy, flat tool, press the burgers down as flat as you can get them in one swift motion. They’ll be super sizzly and splattery, but they should make a nice, round, thin smash burger shape on the griddle. (The ideal tool for this is a cast iron grill press, but a flat spatula can work in a pinch). Cook for a few minutes and then flip and top with cheese right away. Leave them undisturbed for another 1-2 minutes to melt the cheese and get a max amount of flavorful browning on the back side.
-
Assemble your burgers and enjoy!