1. Prepare the Onions:
– In a large skillet, heat the butter and olive oil over medium heat.
– Add the sliced onions and cook, stirring frequently, until they are caramelized and golden brown, about 15-20 minutes.
2. Add Flavor:
– Once the onions are caramelized, add the beef broth and thyme to the skillet.
– Cook for an additional 5 minutes, allowing the broth to reduce slightly. Remove from heat and set aside.
3. Form the Patties:
– In a bowl, combine the ground beef, salt, pepper, and Worcestershire sauce. Mix gently until just combined.
– Divide the mixture into four equal portions and shape them into patties.
4. Cook the Burgers:
– Preheat a grill or skillet over medium-high heat.
– Cook the patties for about 4-5 minutes on each side, or until they reach your desired level of doneness.
– During the last minute of cooking, place a slice of Swiss cheese on each patty and cover to melt.
5. Assemble the Burgers:
– Toast the burger buns lightly on the grill or in a toaster.
– Place each patty on a bun and top generously with the caramelized onion mixture.
– Garnish with fresh parsley if desired.
Prep Time: 10 minutes | Cook Time: 30 minutes | Servings: 4
Savor the delicious combination of flavors in this French Onion Soup Burger, a perfect twist on a classic favorite!
