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The origins of French onion soup date back to ancient times, but it truly gained popularity in the 18th century in France, where it became a staple in bistros and homes alike. The soup's hallmark is its deeply caramelized onions, which are simmered to perfection and topped with crusty bread and melted cheese. The transition from soup to burger showcases the nostalgic flavors that many of us cherish, introducing a new way to enjoy a beloved dish. The French Onion Burger pays homage to this classic by bringing together the sweet, savory, and umami flavors that characterize both the soup and the burger, creating a delightful culinary experience that is sure to leave a lasting impression.

French Onion Burgers

Savor the mouthwatering fusion of flavors with French Onion Burgers, where juicy patties meet rich caramelized onions and melted Swiss cheese. This easy yet elegant recipe brings comfort food to a new level, perfect for family dinners or friendly gatherings. Discover tips for caramelizing onions, crafting the juiciest patties, and assembling the ultimate burger. Click through to explore this delightful recipe and impress your loved ones with an unforgettable meal!
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Ingredients
  

1 pound ground beef (80/20 blend)

1 large onion, thinly sliced

2 tablespoons butter

1 teaspoon sugar

Salt and pepper to taste

4 slices Swiss cheese

4 burger buns, toasted

2 tablespoons mayonnaise

1 tablespoon Dijon mustard

Fresh thyme leaves (optional, for garnish)

Instructions
 

Caramelize the Onions: In a large skillet, melt the butter over medium heat. Add the sliced onions and sugar, stirring to coat. Cook slowly for about 15-20 minutes, stirring occasionally until the onions are deeply caramelized and golden brown. Season with a pinch of salt and set aside.

    Form the Patties: While the onions are cooking, divide the ground beef into four equal portions and form them into patties. Make a small indentation in the center of each patty to prevent them from puffing up during cooking. Season both sides with salt and pepper.

      Cook the Burgers: Heat a grill or skillet over medium-high heat. Cook the patties for about 4-5 minutes on one side, flip them, and immediately place a slice of Swiss cheese on each patty. Cook for another 4-5 minutes or until the burgers reach your desired doneness (internal temperature of 160°F for medium).

        Prepare the Buns: While the burgers are cooking, spread mayonnaise and Dijon mustard on the toasted burger buns.

          Assemble the Burgers: Place a cheeseburger patty on each bun bottom, then generously pile on the caramelized onions. Top with the other half of the bun.

            Garnish and Serve: If desired, sprinkle fresh thyme leaves on top of the burgers for added flavor and aroma. Serve immediately.

              Prep Time: 15 minutes | Total Time: 40 minutes | Servings: 4