Heat a large skillet over medium heat. Place the butter in the skillet and swirl it around. Place the hamburger buns cut-side down in the melted butter and toast for about 60 seconds. Remove the buns from the skillet.

Form the ground chuck into 4 patties (8 ounces each) and place them in the skillet. Use a spatula to press down on the hamburger patties. Then take a large soup can that has been wrapped in aluminum foil and press down on each patty. Cook for about 3 to 5 minutes on each side, until the patties reach your desired level of doneness. Season each side with salt and pepper while cooking.

To assemble the burgers, place a slice of cheese on the bottom bun. Add the burger patty, another slice of cheese, 4 pickles, and 1 tablespoon of red onions. Then add the ketchup and mustard, and cover with the top bun. Serve immediately.