French Onion Soup
French Onion Soup Ingredients 4 tablespoons unsalted butter 1 tablespoon vegetable oil 3 pounds Vidalia (or sweet) onions (about 5 medium), halved lengthwise and thinly sliced ¾ teaspoon salt ½ teaspoon freshly ground black pepper ¾ teaspoon granulated sugar 1 cup dry white wine 2 tablespoons all-purpose flour 6 cups beef broth 1 teaspoon Worcestershire sauce ½ teaspoon dried thyme 2 bay leaves 1 small baguette, cut into ½-in slices 1 tablespoon dry sherry 8 ounces Gruyère cheese, grated about 2 heaping cups ½ cup grated Parmigiano Reggiano