To make beet root powder, first boil or bake a few beets, then peel them, cut them into thin strips, and dehydrate them using an oven or a dehydrator. If you use an oven, you’ll want to keep it at 140 degrees Fahrenheit, with the door propped open to avoid moisture buildup. After 8-10 hours, they should be fully dehydrated. To turn them into a powder, put them in a food processor until you have a fine powder.