Preheat grill over medium heat. Form hamburger into four even patties. Then season each patty with about ½ tablespoon of the steak seasoning.
Cook a batch of sautéed mushroom and onions and then set aside.
Add patties to grill. Grill for about 8 minutes on one side, then flip and grill for about 6-8 minutes on the other side or until cooked through. Top with a slice of Swiss cheese and let the heat from the grill melt the cheese.Finally, remove patties from grill. Place each patty onto a brioche bun, top with sautéed mushrooms and onions, and then serve immediately. Enjoy!
Do not overcook burgers: Make sure not to overcook your burgers, so just about 6-8 minutes per side.
Cheesy Mushroom Swiss Cheeseburgers: One slice of Swiss cheese is enoughbut if you want a cheesy burger, you should probably use at least 2, if not 3 slices.
Burger Toppings: Top your burger bun with your favorite toppings. Arugula, lettuce, and tomatoes are always favorites.
Lean Burgers: We used 80/20 ground beef but if you want a leaner burger, you can use 90/10 ground beef.
Burger Bun: If brioche buns are unavailable, any bun will work.
Pan Fried Burgers: You can pan fry the burger patties if preferred.