Preheat a skillet with the butter over medium-high heat. When the butter foams and browns slightly, put the beef into the skillet in 2 equal mounds. Sprinkle the beef with the salt and Worcestershire sauce.

Use a spatula to press the beef into 2 thin patties, slightly larger than the bun you'll be using. After 3 minutes, flip the patties and top each one with a slice of cheese. Let cook for 2-3 minutes more to brown the beef, then stack the patties on top of each other.

Serve on the bun with any toppings and condiments you like. Enjoy!