Elevate your burger night with irresistible French onion burgers! This gourmet twist adds rich caramelized onions and melty Gruyère cheese to a juicy beef patty, creating an unforgettable flavor experience. Perfect for gatherings or family dinners, these mouthwatering burgers will impress everyone at your table. Discover the secrets to mastering this delicious recipe and serve them with crispy fries or a fresh salad. Click to explore this delightful recipe and elevate your cooking game!
1 lb ground beef (80/20 blend)
1 large onion, thinly sliced
2 tablespoons unsalted butter
1 tablespoon olive oil
1 teaspoon sugar
1 teaspoon salt
1/2 teaspoon black pepper
4 slices Gruyère cheese
4 hamburger buns, toasted
2 tablespoons mayonnaise
1 tablespoon Dijon mustard
Fresh thyme leaves for garnish (optional)