French Onion Soup Recipe by Tasty

Ingredients

• 4 tablespoons olive oil
• 2 tablespoons butter
• 6 cups yellow onion, thinly sliced
• 1 teaspoon salt
• ½ teaspoon sugar
• 3 tablespoons flour
• 6 cups beef stock
• 1 cup white wine
• ½ teaspoon ground sage
• 1 leaf whole bay leaf
• 1 loaf french bread, or baguette
• 3 tablespoons cognac, optional
• 12 oz swiss cheese, grated
• pepper, to taste
• 4 oz parmesan cheese, grated