Classic French Onion Soup Recipe: Hug in a Bowl

Ingredients

• 3 tablespoons (45 ml) unsalted butter
• 2 tablespoons (30 ml) olive oil
• 3 pounds (1.4 kg) yellow onions, thinly sliced
• 1 teaspoon (5 ml) granulated sugar
• 1/2 teaspoon (2.5 ml) kosher salt, plus more to taste
• 1/4 teaspoon (1.25 ml) freshly ground black pepper, plus more to taste
• 2 cloves garlic, minced
• 1/4 cup (60 ml) dry sherry or dry white wine (optional, but highly recommended)
• 8 cups (1.9 liters) beef broth, low sodium
• 4 sprigs fresh thyme
• 1 bay leaf
• 1 baguette, sliced into 1-inch rounds
• 6 ounces (170 g) Gruyère cheese, shredded