- 1 1/2 pounds ground beef
- 1 tablespoon Worcestershire sauce
- 3/4 teaspoon garlic salt
- 1 teaspoon black pepper
- 4 slices cheese
- 4 hamburger buns, split
- Combine ground beef, Worcestershire sauce, garlic salt, and pepper in a large bowl; mix well.
- Form 8, thin patties from the beef. Each patty should be slightly larger than a slice of cheese.
- Cut each slice of American cheese into 4 equal pieces; stack the pieces.
- Sandwich one stack of cheese between 2 ground beef patties.
- Tightly pinch edges together tightly seal the cheese within the meat.
- Repeat with the remaining cheese and patties.
- Preheat a cast-iron or other heavy bottomed skillet over medium heat.
- Cook burgers until well browned, about 4 minutes.
- It is common for burgers to puff up due to steam from the melting cheese.
- Turn burgers and prick the top of each to allow steam to escape; cook until browned on the outside and no longer pink on the inside; about 4 minutes.
- Serve on hamburger buns.