Description
Imagine all the rich, comforting flavors of French onion soup transformed into a juicy, mouthwatering burger. With perfectly caramelized onions, melted Gruyère cheese, and juicy beef patties, these French Onion Soup Burgers are an indulgent twist on the classic burger that will take your taste buds to new heights. Topped with a touch of Dijon-mayo spread and served on toasted brioche buns, this burger is gourmet comfort food at its best.
Ingredients
Scale
- 1 ½ lbs ground beef (80/20 blend for juicier burgers)
- 2 large onions, thinly sliced
- 2 tbsp butter
- 1 tbsp olive oil
- 2 tsp balsamic vinegar
- 1 tsp sugar
- 1 tsp fresh thyme (or ½ tsp dried thyme)
- Salt and pepper, to taste
- 4 slices Gruyère cheese (or Swiss cheese)
- 4 brioche burger buns
- ½ cup beef broth
- 2 tbsp mayonnaise
- 1 tbsp Dijon mustard
- Fresh parsley, chopped (optional for garnish)
Instructions
- Caramelize the Onions: Heat butter and olive oil in a large skillet over medium heat. Add sliced onions and cook for 10 minutes, stirring occasionally. Add sugar, balsamic vinegar, thyme, salt, and pepper. Reduce heat to low and cook for an additional 20-25 minutes until onions are golden and caramelized. Add beef broth and simmer until reduced, about 5 minutes. Set aside.
- Prepare the Burgers: Preheat grill or skillet to medium-high heat. Shape ground beef into 4 equal patties, seasoning with salt and pepper. Grill or cook for 4-5 minutes per side, topping each with a slice of Gruyère cheese during the last minute of cooking to melt.
- Assemble the Burgers: Lightly toast the brioche buns. Mix mayonnaise and Dijon mustard in a small bowl, then spread on the bottom halves of the buns. Place the cheesy beef patties on each bun and top with a generous portion of caramelized onions. Add the top bun and garnish with fresh parsley if desired.
- Serve: Serve immediately with fries or a salad and enjoy!
Notes
- Gruyère Substitutes: If you can’t find Gruyère, Swiss cheese or provolone work beautifully.
- Caramelizing Onions: Patience is key! Low and slow cooking gives the onions their sweet, caramelized depth of flavor.
- Doneness: Use a meat thermometer to ensure your burger reaches your preferred doneness—160°F for well-done, 130-135°F for medium-rare.
- Make Ahead: You can caramelize the onions and form the patties in advance to save time!
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Category: Main Course
- Method: Grilling / Skillet
- Cuisine: American, French-inspired
Nutrition
- Serving Size: 1 burger
- Calories: 680 kcal
- Sugar: 7g
- Sodium: 760mg
- Fat: 42g
- Saturated Fat: Saturated Fat: 18g
- Unsaturated Fat: 21g
- Trans Fat: 1g
- Carbohydrates: 41g
- Fiber: 2g
- Protein: 34g
- Cholesterol: 130mg