Smash Burgers

1. Divide the beef into 12 portions and form them into balls.
3. Put a large cast iron skillet or nonstick skillet on medium high heat. Add in butter and the buns and toast the buns until golden.
4. To that same skillet Add in 2 to 4 balls to the pan, leaving plenty of space around them. Add a small amount of the sliced onions on top of the meat balls, smash them down into thin patties and season generously with salt and pepper to taste.
5. Cook until golden brown, about 2 minutes, before flipping.
6. Place the cheese on the patties and when it has melted, scrape the burgers out of the pan and continue with the rest.
7. Make the sauce by combining together the mayonnaise, ketchup, mustard, relish, Worcestershire sauce and cayenne pepper.
8. Assemble the burgers- bun, sauce, lettuce, tomato, 2 patties, more sauce, bun and devour.