Description
Savor the rich, gourmet flavors of this French Onion Croissant Burger featuring juicy ground beef patties topped with melted Swiss or Gruyère cheese, sweet caramelized onions, and a tangy mayo-mustard spread all nestled inside flaky buttery croissants. Perfect for an elevated burger experience that combines classic French and American tastes.
Ingredients
Scale
For the Patties and Seasoning
- 1 lb ground beef (80/20 blend)
- 1 tsp salt
- 1/2 tsp black pepper
For the Caramelized Onions
- 2 tbsp butter
- 2 large yellow onions, thinly sliced
- 1 tsp sugar
- 1/2 tsp thyme (fresh or dried)
- 1 tbsp Worcestershire sauce
For Assembling
- 4 buttery croissants, halved
- 4 slices Swiss or Gruyère cheese
- 1/4 cup mayonnaise
- 1 tbsp Dijon mustard
- Fresh arugula or baby greens (optional)
Instructions
- Caramelize the Onions: In a skillet over medium heat, melt the butter. Add the thinly sliced onions and cook, stirring occasionally, until they are soft and golden brown, which should take about 20 to 25 minutes. Stir in the sugar, thyme, and Worcestershire sauce, and continue cooking for another 2 to 3 minutes until the onions are fully caramelized. Remove from heat and set aside.
- Prepare and Cook the Patties: While the onions are cooking, divide the ground beef into four equal portions and form into patties. Season both sides evenly with salt and black pepper. Heat a grill pan or skillet over medium-high heat and cook the patties for 3 to 4 minutes per side, or until they reach your desired level of doneness. In the last minute of cooking, place a slice of cheese on each patty and cover the pan to allow the cheese to melt.
- Toast the Croissants: Lightly toast the croissant halves in a dry skillet or a toaster oven until they are just crisp and warmed through. This adds texture and prevents sogginess.
- Mix the Mayo-Mustard Sauce: In a small bowl, combine the mayonnaise and Dijon mustard, stirring until smooth. This will add a creamy, tangy layer of flavor to the burgers.
- Assemble the Burgers: Spread the mayo-mustard mixture evenly on the bottom half of each toasted croissant. If desired, add a handful of fresh arugula or baby greens on top of the spread. Place the cheesy burger patty over the greens, then spoon a generous portion of the caramelized onions over the patty. Finish by placing the top half of the croissant over the fillings.
- Serve: Serve your French Onion Croissant Burgers immediately alongside your favorite chips, a fresh salad, or classic French fries for a complete meal.
Notes
- For an extra indulgent twist, add crispy bacon or a fried egg to the burger layers.
- You can substitute ground beef with ground turkey or plant-based patties for a lighter or vegetarian option.
- Fresh thyme works wonderfully if you have it, but dried thyme is a suitable and convenient alternative.
- To intensify the flavors, let the caramelized onions cool and refrigerate; they can be made a day ahead and reheated gently before assembling.
