Naturesmith Small Onion powder is dried onion that’s been ground. Although dried onion is just onion flesh, onion powder can also include dehydrated onion skins and roots. Enriched with the goodness of essential vitamins like vitamin B and C, minerals like manganese, calcium, iron and potassium, and a myriad of antioxidants, onion powders hold high significance in treating a host of ailments including mouth sores, heart problems, headaches, high blood sugar and even cancer. Onion powder is an additional asset that makes it incredibly useful in the kitchen. Sprinkle it into soups and stews, create creamy dips and salad dressings, perk up casseroles and vegetables, or use it as a base for rubs and marinades.