Start by adding ground beef, mayonnaise, Parmesan cheese, chopped green onions, Worcestershire sauce, garlic powder, salt, and pepper to a large mixing bowl. Gently mix everything with your hands or a spoon just until combined — overmixing can make the burgers tough. Divide into four even portions and shape into round patties.
Preheat your skillet or grill over medium-high heat. Once hot, place the patties on and cook for about 4–5 minutes per side. Don’t press down on them while cooking — you’ll lose the juices! When almost done, top each patty with a slice of cheddar cheese and let it melt.
Toast the buns face-down in the same pan for about a minute, just until golden. Place a patty on the bottom bun, add two slices of crispy bacon, lettuce, tomato, and pickles, then finish with the top bun. Serve them right away while hot, juicy, and melty.