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To appreciate the French onion burger fully, it helps to delve into the history of its foundational element—French onion soup. Originating in the 18th century, this classic French dish was initially a humble meal enjoyed by the working class. Made with just a few basic ingredients—onions, beef broth, and bread—it quickly gained popularity due to its rich flavor and heartiness. Over time, French onion soup evolved into a culinary icon, celebrated for its comforting qualities and elegant presentation, often topped with melted cheese and toasted bread.

French Onion Burgers

Savor the taste of a French onion burger, a delicious twist on a classic favorite that brings the comfort of French onion soup straight to your plate. This gourmet burger is loaded with caramelized onions, melted cheese, and a hint of beef broth, all nestled in buttery brioche buns. Perfect for any meal, this recipe is simple to make and will have everyone asking for seconds. Click through to discover the full recipe and elevate your burger game today!
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Ingredients
  

1 lb ground beef (80% lean)

1 large onion, thinly sliced

2 tablespoons unsalted butter

1 tablespoon olive oil

1 teaspoon sugar

1 teaspoon beef broth base (or bouillon powder)

4 slices Swiss cheese (or Gruyère)

4 burger buns (preferably brioche)

Salt and pepper to taste

Fresh thyme leaves for garnish (optional)

Instructions
 

Caramelize the Onions: In a large skillet, heat the butter and olive oil over medium heat. Add the sliced onion and sprinkle with sugar. Cook for 15-20 minutes, stirring occasionally until the onions are soft and caramelized, and turn a golden brown. Add the beef broth base for extra flavor and mix well. Remove from heat and set aside.

    Prepare the Burgers: While the onions are cooking, form the ground beef into four equal patties. Season each side with salt and pepper.

      Cook the Burgers: In the same skillet (wipe it down if necessary), increase the heat to medium-high. Cook the burger patties for about 4-5 minutes on each side for medium doneness, or until your desired doneness is reached.

        Melt the Cheese: During the last minute of cooking, place a slice of Swiss cheese on each patty and cover the skillet with a lid to help the cheese melt nicely.

          Toast the Buns: If desired, you can toast the burger buns in a toaster or on a separate skillet until golden brown.

            Assemble: On the bottom half of each toasted bun, place a cheeseburger patty, topped with a generous helping of caramelized onions. Add the top bun to complete the burger.

              Garnish and Serve: Optionally sprinkle fresh thyme leaves on top for an aromatic touch. Serve hot with your choice of side (fries, chips, or a salad).

                Prep Time: 15 minutes | Total Time: 45 minutes | Servings: 4 burgers