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Instructions:
1. Prepare the Onions:
– In a large skillet, heat the butter and olive oil over medium heat.
– Add the sliced onions and cook, stirring occasionally, for about 15-20 minutes until they are caramelized and golden brown.
– Stir in the thyme and cook for an additional minute.
– Pour in the beef broth and let it simmer for about 5 minutes, allowing the flavors to meld. Remove from heat and set aside.
2. Shape the Patties:
– In a bowl, combine the ground beef, salt, pepper, and Worcestershire sauce. Mix gently until just combined.
– Divide the mixture into 4 equal portions and shape them into patties, making a slight indentation in the center of each.
3. Cook the Burgers:
– Preheat a grill or skillet over medium-high heat.
– Cook the patties for about 4-5 minutes on one side. Flip the burgers and place a slice of Swiss cheese on each patty.
– Continue cooking for another 4-5 minutes, or until the burgers reach your desired doneness and the cheese is melted.
4. Assemble the Burgers:
– Toast the burger buns lightly on the grill or in a toaster.
– Place each burger patty on a bun and top generously with the caramelized onion mixture.
5. Serve:
– Garnish with fresh parsley and serve immediately with your favorite sides.
Prep Time: 15 minutes | Cook Time: 30 minutes | Servings: 4
Indulge in this delicious French Onion Soup Burger that combines the best of both worlds! Enjoy every bite! 
