Lipton Onion Soup Mix is a proprietary mix sold by Lipton which is used to prepare onion soup or onion dip. The key ingredients comprising Lipton Onion Soup mix are dried minced onion, onion powder, beef bouillon powder and crushed celery seeds. The soup mix can also be combined with sour cream in order to make onion dip which is served along with various snacks and appetizers.