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French Onion Burgers

These French Onion Burgers are a dreamy mess of everything you want in the perfect pan seared patty with piles of onions, zesty mustard, and Gruyere cheese.
Course Main Course
Cuisine American
Prep Time 10 minutes
Cook Time 35 minutes
Total Time 45 minutes
Servings 4
Calories 394kcal


  • 1 lbs ground beef
  • 1-2 teaspoon Worcestershire sauce
  • 1 teaspoon fresh snipped parsley
  • ½ teaspoon fresh thyme
  • ½ teaspoon garlic salt plus a dash
  • ¼ teaspoon pepper
  • 2 tbs olive oil
  • 1 onion sliced
  • 2 tbs white wine
  • sliced Gruyere cheese
  • 1 tbs coarse grain mustard
  • 1 tbs mayo


  • In a medium bowl, combine the ground beef with Worcestershire, parsley, thyme, garlic salt, and pepper. 
  • Form into 4 patties. 
  • Cover and set in refrigerator until ready to cook, at least one hour.
  • Preheat broiler.
  • Heat 1 tbs olive oil in a large ovenproof skillet over medium heat. Add the onion and cook for 8-10 minutes until just starting to brown. 
  • Add the wine, scraping up any browned bits, cover, reduce heat to low and cook for 10 – 15 minutes more. 
  • Remove from skillet, cover with aluminum foil, and set aside.
  • Wipe out the skillet, increase heat to medium-high. Add 1 tablespoon oil and heat until just smoking. You want the skillet hot. 
  • Sprinkle a dash of salt on the top and bottom of every patty and place in the skillet without over overcrowding your skillet. Cook until a nice crust forms on bottom, about 4 minutes. 
  • Flip and cook 4 to 5 minutes longer. Remove skillet from heat.
  • Place slices of cheese on burgers and place skillet (if oven safe) under the broiler until cheese is golden and melty, about 1 minute.
  • Mix the mustard and mayo together and spread on toasted buns. Top with a patty and a heaping portion of onion.


Calories: 394kcal | Carbohydrates: 3g | Protein: 19g | Fat: 32g | Saturated Fat: 10g | Cholesterol: 81mg | Sodium: 447mg | Potassium: 358mg | Sugar: 1g | Vitamin C: 2.1mg | Calcium: 27mg | Iron: 2.4mg