French Onion Soup: Deeply Delicious Recipe - Chef YoYo

Ingredients

• 3 pounds yellow onions, thinly sliced (1.4 kg)
• 4 tablespoons unsalted butter (56 g)
• 2 tablespoons olive oil (30 ml)
• 1 teaspoon granulated sugar (5 g)
• 1/2 teaspoon baking soda (2.5 ml/g)
• 1/4 cup dry sherry (60 ml)
• 8 cups beef broth (2 liters)
• 4 cups water (1 liter)
• 2 bay leaves
• 4 sprigs fresh thyme
• Salt and freshly ground black pepper to taste
• 6 baguette slices, approximately 1 inch thick
• 6 ounces Gruyère cheese, shredded (170 g)
• Fresh parsley, chopped for garnish (Optional)