Why You’ll Love This Recipe

French Onion Burgers combine the rich, savory flavor of classic French onion soup with the juicy satisfaction of a perfectly cooked burger. Caramelized onions, melted cheese, and a beefy patty are all nestled in a toasted bun, creating a gourmet-style burger that’s comforting, flavorful, and surprisingly easy to make at home. Ideal for weeknight dinners or backyard cookouts, these burgers are sure to impress.

ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

ground beefyellow onionsbutterolive oilbeef brothWorcestershire sauceSwiss cheese or Gruyère cheesebrioche or hamburger bunsgarlic powdersalt and black pepperthyme (optional)mayonnaise (optional)

directions

Thinly slice the onions and set aside.

In a skillet over medium heat, melt butter with olive oil.

Add sliced onions and cook slowly, stirring occasionally, until deeply caramelized—about 25–30 minutes.

Add a splash of beef broth and Worcestershire sauce to deglaze the pan, scraping up browned bits. Simmer until liquid evaporates.

Season the ground beef with salt, pepper, and a bit of garlic powder. Form into equal-sized patties.

Heat a skillet or grill over medium-high heat and cook the patties for 3–4 minutes per side, or until desired doneness.

Top each patty with a slice of cheese during the last minute of cooking, covering to melt the cheese.

Toast the buns lightly on a skillet or grill.

Assemble the burgers: spread mayonnaise on the buns (if using), place the patty on the bottom bun, top with a generous heap of caramelized onions, sprinkle with thyme (optional), and cover with the top bun.

Servings and timing

This recipe yields 4 burgers.
Preparation time: 10 minutes
Caramelizing time: 25–30 minutes
Cooking and assembling time: 10 minutes
Total time: 45–50 minutes

Variations

Use Gruyère for a more authentic French onion flavor.
Swap mayonnaise with garlic aioli or Dijon mustard.
Add sautéed mushrooms for extra umami.
Make it a double patty for a heartier version.

storage/reheating

Store leftover patties and onions separately in airtight containers in the fridge for up to 3 days.
Reheat patties in a skillet or microwave until warmed through.
Onions can be reheated in a skillet over low heat or in the microwave.

FAQs

Can I use a different type of cheese?
Yes, provolone, mozzarella, or white cheddar also work well.

Do I have to caramelize the onions that long?
Slow caramelization builds the deep flavor—don’t rush it.

Can I use store-bought caramelized onions?
You can, but homemade delivers the best flavor.

Can I make this vegetarian?
Yes, use a plant-based burger patty and vegetable broth for the onions.

Are these burgers freezer-friendly?
Yes, freeze the cooked patties and onions separately. Reheat before serving.

Can I cook the patties on the grill?
Absolutely. Grill for 3–4 minutes per side over medium-high heat.

Is there a low-carb option?
Serve the burger in a lettuce wrap instead of a bun.

How can I prevent the burger from falling apart?
Avoid overmixing the meat and don’t press down on the patties while cooking.

Can I use red onions instead?
Yes, but yellow onions provide a more classic French onion flavor.

What bun is best?
Brioche buns are ideal for their slight sweetness and soft texture.

Conclusion

French Onion Burgers take everything you love about a cozy bowl of French onion soup and transform it into an irresistible handheld meal. With layers of flavor from deeply caramelized onions, melty cheese, and juicy beef, they’re a satisfying upgrade to your burger lineup. Whether you’re grilling out or enjoying a weeknight dinner, this recipe delivers gourmet comfort with every bite.