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French onion filet mignon burger with caramelized onions and gruyere cheese on an onion bun
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French Onion Filet Mignon Burger

This French Onion burger is comfort food on a bun.
Prep Time10 mins
Cook Time24 mins
Total Time34 mins
Course: Main Course
Cuisine: American
Keyword: French Onion Burger
Servings: 2 servings
Author: Chef David Rose


French Onions

  • 1 medium yellow onion, sliced razor-thin
  • 2 garlic cloves, smashed
  • 1/4 cup olive oil
  • 1/4 cup bourbon
  • 1 cup beef broth
  • 3 tablespoons Knorr French Onion Recipe Mix
  • 1 tablespoon unsalted butter
  • Salt and pepper


  • 2 Omaha Steaks PureGround™ Filet Mignon Burgers
  • 4 teaspoons Knorr French Onion Recipe Mix
  • 1 teaspoons kosher salt
  • 1/2 teaspoons black pepper
  • 8 oz. Gruyere cheese, divided into 4 slices
  • 2 onion hamburger buns
  • 4 tablespoons mayonnaise
  • 6 oz. vegetable oil
  • 1/2 cup beef broth


French Onions

  • In a large saucepan, melt olive oil and butter; add onions and sauté until caramelized, about 5 to 6 minutes.
  • Add bourbon and reduce until almost dry, about 2minutes.
  • Add beef stock and French onion recipe mix and simmer until reduced by 2/3 volume and thickened to sauce-like consistency, about 5 minutes.
  • Season to taste with salt and pepper.
  • Remove from heat and cool to room temperature.


  • Remove burgers from fridge and allow to come to come room temperature, about 20 minutes.
  • In a small bowl, whisk together French onion mix and salt and pepper until well-incorporated; season burgers liberally on both sides, pressing seasoning lightly into burger.
  • In a heavy-duty saucepan with a lid, bring to medium-high heat, add vegetable oil, and cook burgers on one side until browned, about 3 to 4 minutes.
  • Flip burgers, add 1 heaping spoonful of French onions to each burger, and top with 1 to 2 slices of Gruyere cheese.
  • Pour beef broth into saucepan, place lid on saucepan, and continue to cook burger about 4 to 5 minutes, until cheese melts and burger has cooked through to desired doneness.
  • To toast buns, spread 1 tablespoon of mayonnaise on each side of bun and place in a separate pan; toast about 30 to 45 seconds until golden-brown.


  • Place French onion burger between toasted buns.