French Onion Soup Burgers
French Onion Soup Burgers combine the rich, savory flavors of classic French onion soup with juicy, handcrafted beef patties, topped with slow-caramelized onions and melted Gruyère cheese. This indulgent recipe turns comforting soup ingredients into a delicious burger, perfect for any occasion.
- Author: Lina
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Total Time: 1 hour
- Yield: 4 servings 1x
- Category: Appetizers
- Method: Grilling and Sautéing
- Cuisine: French-American
- Diet: Gluten Free (with gluten-free buns or lettuce wraps)
For the Beef Patties
- 1 lb high-quality 80/20 ground beef
- Salt, to taste
- Black pepper, to taste
- Fresh thyme leaves, 1 teaspoon
For the Caramelized Onions
- 3 to 4 large yellow onions, thinly sliced
- 2 tablespoons butter
- 1 tablespoon olive oil
- 1/2 cup beef broth
- Salt, to taste
- Black pepper, to taste
- 2 cloves garlic, minced (optional)
- Fresh thyme sprigs, for aroma
Toppings and Assembly
- Gruyère cheese slices, enough to cover patties
- French rolls or brioche buns, 4, soft but sturdy
- Caramelize the Onions: Thinly slice 3 to 4 large yellow onions. Heat butter and olive oil in a wide skillet over medium-low heat. Add the onions and optional garlic, stirring occasionally. Cook slowly for 30 to 40 minutes until onions turn deep golden brown and develop a silky sweetness. Stir in beef broth midway for moisture, season with salt, pepper, and fresh thyme sprigs to enhance aroma.
- Prepare the Beef Patties: In a mixing bowl, gently combine ground beef with salt, pepper, and fresh thyme leaves. Shape the mixture into evenly sized patties without overworking the meat to retain juiciness and tenderness.
- Cook the Patties: Heat a grill or skillet to medium-high. Cook each patty about 4 minutes per side for medium doneness. Just before finishing, spoon caramelized onions over each patty and top with slices of Gruyère cheese. Cover the pan or close the grill lid to melt the cheese perfectly.
- Prepare the Buns: Lightly toast French rolls or brioche buns in a hot pan or oven until slightly crispy to add texture and prevent sogginess from toppings.
- Assemble Your Burgers: Spread a spoonful of extra caramelized onions on the bottom bun, place the cheesy beef patty on top, add any additional favorite toppings, and finish with the top bun. Serve immediately and enjoy.
Notes
- Go slow when caramelizing onions to develop rich flavors and avoid bitterness.
- Use quality Gruyère cheese for the best melting and authentic flavor.
- Handle ground beef lightly when forming patties to keep burgers tender.
- Let cooked patties rest a few minutes before assembling to preserve juiciness.
- Toast buns to create a moisture barrier and enhance texture.
Nutrition
- Serving Size: 1 burger
- Calories: 550 kcal
- Sugar: 8 g
- Sodium: 700 mg
- Fat: 35 g
- Saturated Fat: 15 g
- Unsaturated Fat: 15 g
- Trans Fat: 0.5 g
- Carbohydrates: 30 g
- Fiber: 2 g
- Protein: 32 g
- Cholesterol: 110 mg
Keywords: French Onion Soup Burgers, caramelized onion burger, Gruyère cheese burger, comfort food burger, easy gourmet burger