Classic French Onion Soup A Proper Comfort Food Soup - Chef YoYo

Ingredients

• 3 tablespoons (45 ml) unsalted butter
• 2 tablespoons (30 ml) olive oil
• 3 large yellow onions, thinly sliced (about 3 lbs or 1.35 kg)
• 2 cloves garlic, minced
• 1 teaspoon (5 ml) dried thyme
• 1/2 teaspoon (2.5 ml) sugar
• 8 cups (1.9 liters) beef broth (low sodium preferred)
• 1 cup (240 ml) dry sherry (or dry white wine, e.g. Sauvignon Blanc)
• 1 bay leaf
• Salt and freshly ground black pepper, to taste
• 6 thick slices of baguette, about 1 inch (2.5 cm) thick
• 6 ounces (170 g) Gruyère cheese, shredded