Onion powder is dehydrated, ground onion that is commonly used as a seasoning. It is a common ingredient in seasoned salt and spice mixes, such as beau monde seasoning. Some varieties are prepared using toasted onion. White, yellow and red onions may be used
Onion powder is basically dried onion that's been ground. Although dried onion is just the onion flesh, onion powder can also include dehydrated onion skins and roots. ... Similarly if your recipe calls for 1 tablespoon onion powder and you need to sub it, use 3 tablespoons dried minced onion, or 1 cup chopped fresh onion.
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.