French Onion Soup

Name: French Onion Soup
Ingredients: 3 tablespoons butter; 3 tablespoons olive oil; 8 sweet onions peeled; 2 teaspoons kosher salt; 2 teaspoons fresh thyme; 2 dried bay leaves; 1 tablespoon flour; 1 teaspoon brown sugar; 1/2 cup white wine; 1/2 cup red wine; 1/4 cup brandy; 8 cups beef broth; 1 small baguette, sliced; Gruyere cheese, sliced