Peel and dice onions.
Place each diced piece of onion on dehydrator tray. Fill each tray.
Set dehydrator to 125°f and let dehydrate for 18-24 hour until completely dry. Time to dry may vary depending on the humidity level in your home.
Once dried, place dried onion in a food processor or mortar.
Grind onion using a pestle or food processor until onion is powder.
Note, mortar and pestle will achieve the best powder like results.
Grind onion using a pestle or food processor until onion is powder.