French Onion Soup Burgers

If you’re a fan of French onion soup, get ready to experience its comforting flavors in burger form with this delectable recipe. Combining the rich taste of caramelized onions with savory ground beef and melted cheese, these French Onion Soup Burgers are sure to become a favorite in your household. Let’s dive into how to make this mouthwatering dish!


  • 1 lb ground beef
  • 2 large onions, thinly sliced
  • 2 tablespoons butter
  • 1 teaspoon sugar
  • 1/2 cup beef broth
  • 2 tablespoons Worcestershire sauce
  • 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)
  • Salt and pepper to taste
  • 4 slices of Gruyère or Swiss cheese
  • 4 hamburger buns
  • 1 clove garlic, minced (optional for garlic butter buns)
  • Additional butter for buns


1. Caramelize the Onions:

  • In a large skillet over medium heat, melt the butter.
  • Add the sliced onions and sugar, and cook, stirring occasionally, until the onions are deeply caramelized and sweet, about 20-25 minutes.
  • Add a splash of beef broth if the onions start to stick, to deglaze the pan.

2. Prepare the Burger Patties:

  • Season the ground beef with salt, pepper, and Worcestershire sauce.
  • Form into 4 equal-sized patties.

3. Cook the Burger Patties:

  • In a separate skillet or on a grill, cook the burger patties to your desired level of doneness.

4. Assemble the Burgers:

  • If desired, prepare garlic butter buns by spreading buns with a mixture of butter and minced garlic, then toasting until golden.
  • On each bun bottom, place a cooked burger patty.
  • Top each patty with a generous helping of caramelized onions and a slice of cheese.

5. Broil the Burgers:

  • Broil the assembled burgers for a few minutes until the cheese is melted and bubbly.

6. Serve and Enjoy:

  • Sprinkle fresh thyme over the cheese, cover with bun tops, and serve immediately.

Nutritional Information:

  • Prep Time: 15 minutes
  • Cooking Time: 30 minutes
  • Total Time: 45 minutes
  • Calories: 650 kcal per burger
  • Servings: 4 servings

Serving and Storage Tips


  • Serve these French Onion Soup Burgers immediately after assembling to enjoy them at their best.
  • Accompany them with your favorite side dishes such as crispy fries, potato wedges, or a refreshing salad.
  • For a complete French onion soup experience, consider serving these burgers alongside a small bowl of extra caramelized onions for dipping.


  • If you have leftovers, store them in an airtight container in the refrigerator for up to 2-3 days.
  • Reheat the burgers in a skillet over medium heat or in the oven at 350°F (175°C) until warmed through.
  • Avoid storing the burgers with the buns assembled, as they may become soggy. Instead, store the burger patties, caramelized onions, and cheese separately, and assemble them just before reheating and serving.


1. Vegetarian Option:

  • Substitute the ground beef with a plant-based alternative such as Beyond Meat or Impossible Burger for a delicious vegetarian version of these burgers.
  • Instead of beef broth, use vegetable broth to caramelize the onions for a fully vegetarian dish.

2. Cheese Varieties:

  • Experiment with different cheese varieties to customize the flavor of your burgers. Try sharp cheddar, creamy brie, or tangy blue cheese for unique taste combinations.
  • For a vegan option, use dairy-free cheese alternatives made from ingredients like soy, almond, or cashews.

3. Flavorful Additions:

  • Enhance the flavor profile of your burgers by incorporating additional ingredients such as caramelized mushrooms, roasted garlic aioli, or crispy bacon strips.
  • Add a dash of balsamic vinegar to the caramelized onions for a touch of acidity and complexity.

4. Bun Options:

  • Swap the traditional hamburger buns for a different bread variety such as ciabatta rolls, pretzel buns, or sourdough bread for added texture and flavor.
  • For a low-carb alternative, serve the burger patties over a bed of fresh lettuce leaves or portobello mushroom caps.

5. Fusion Twist:

  • Infuse international flavors into your French Onion Soup Burgers by incorporating ingredients like teriyaki sauce, sriracha mayo, or kimchi for an Asian-inspired twist.
  • Experiment with different herbs and spices such as rosemary, cumin, or smoked paprika to create unique flavor profiles.

6. Slider Version:

  • Transform this recipe into bite-sized sliders by using smaller-sized burger patties and slider buns. Perfect for parties or gatherings, these mini burgers are sure to be a hit among guests.

By exploring these variations, you can customize your French Onion Soup Burgers to suit your taste preferences and culinary creativity. Whether you’re vegetarian, cheese connoisseur, or flavor enthusiast, there’s a variation to satisfy every palate and occasion. Enjoy experimenting and discovering new flavor combinations with this versatile recipe!


1. Can I use a different type of cheese for these burgers?

  • Yes, absolutely! While Gruyère or Swiss cheese are traditional choices, you can experiment with other varieties such as cheddar, brie, or even blue cheese for a unique flavor twist.

2. Can I make these burgers ahead of time and reheat them later?

  • Yes, you can prepare the burger patties and caramelized onions ahead of time, store them separately in the refrigerator, and then assemble and reheat the burgers when ready to serve.

3. How do I prevent the burger buns from getting soggy?

  • To prevent the buns from becoming soggy, avoid assembling the burgers until just before serving. Alternatively, lightly toast the buns before assembling to create a barrier that helps keep them crisp.

4. Can I make a vegetarian version of these burgers?

  • Absolutely! You can replace the ground beef with a plant-based alternative and use vegetable broth instead of beef broth for caramelizing the onions to create a delicious vegetarian version of these burgers.

5. How long does it take to caramelize the onions?

  • Caramelizing onions typically takes around 20-25 minutes over medium heat. Be patient and stir occasionally to ensure they cook evenly and develop a deep, sweet flavor.

6. Can I freeze these burgers?

  • While it’s best to enjoy these burgers fresh, you can freeze the cooked burger patties for up to 1-2 months. Thaw them overnight in the refrigerator before reheating and serving.

7. What can I serve with French Onion Soup Burgers?

  • These burgers pair well with classic side dishes such as crispy fries, potato wedges, or a simple green salad. For a complete meal, consider serving them alongside a bowl of soup or roasted vegetables.

8. Can I customize the seasoning of the burger patties?

  • Absolutely! Feel free to adjust the seasoning of the burger patties according to your taste preferences. Add herbs, spices, or even a splash of hot sauce to elevate the flavor to your liking.

9. How can I make these burgers gluten-free?

  • To make these burgers gluten-free, simply use gluten-free hamburger buns or serve the burger patties over a bed of lettuce leaves instead of buns.

10. Are French Onion Soup Burgers suitable for meal prep?

  • Yes, you can incorporate these burgers into your meal prep routine by preparing the caramelized onions and burger patties ahead of time and storing them separately. Assemble the burgers just before serving or reheating for a convenient and delicious meal option.

With its irresistible combination of caramelized onions, juicy burger patties, and gooey melted cheese, French Onion Soup Burgers offer a delightful twist on the classic burger. Whether you’re hosting a barbecue or craving a cozy homemade meal, these burgers are guaranteed to impress. Give this recipe a try and savor the comforting flavors of French onion soup in every bite!