They can use at any time.  Because of dehydration, it is possible to keep various forms of onion for a long time and for future use. There are the various form of dehydrated onion: dehydrated onion chopped, flakes, kibbled, powder, granules and minced onion. Dehydrated White Onion Powder is mostly used in the preparation of diverse food items such as fast food, snack foods, pickled products, meat products, sea food products, canned foods, salad dressing, dips, bottle packs, seasoning, bakery topping, gourmet sauces, seasoning and in many others.