To make garlic powder at home, start by peeling several fresh garlic cloves and slicing them as thinly as you comfortably can; the thinner the slices, the more evenly and quickly they will dry. Spread these slices in a single layer on a baking sheet if you’re using an oven, or on dehydrator trays if you have a dehydrator. Dry them at a low temperature—around 150–170°F (65–75°C) in the oven for a couple of hours, or about 125°F (52°C) in a dehydrator for several hours until the pieces become comp