French Onion Soup Burgers – Juicy, Melty & Loaded with Caramelized Onions

These French Onion Soup Burgers are a savory twist on the classic cheeseburger — loaded with deeply caramelized onions, melted Gruyère cheese, and a hint of thyme. Inspired by the rich, comforting flavors of French onion soup, each bite is juicy, cheesy, and dripping with buttery onion goodness. Perfect for elevated burger nights or when you’re craving something bold and cozy. 🍔🧅🔥

Ingredients

For the Onions

• 2 large onions, thinly sliced
• 2 tablespoons butter
• 1 teaspoon sugar
• ½ cup beef broth (for deglazing)

For the Burger Patties

• 1 lb ground beef
• 2 tablespoons Worcestershire sauce
• Salt and pepper, to taste

For Assembly

• 4 slices Gruyère or Swiss cheese
• 4 hamburger buns
• 1 clove garlic, minced (optional, for garlic butter)
• 2 tablespoons butter (for toasting buns)
• 1 teaspoon fresh thyme leaves (or ½ tsp dried)
  

  Instructions