Do-It-Yourself Garlic Powder

Slice garlic very thinly and spread out in a single layer on a dehydrator tray. Alternatively, you can use drying racks or a parchment-lined baking sheet in your oven (convection setting if you have one) with the door cracked open. An old wine cork works well for this purpose.

Dehydrate at 130°F, stirring and turning slices every few hours until garlic is fully dry. When dehydration is complete, the garlic chips will snap in half rather than bend. Make sure all chips are completely dry, or your powder will clump.

Allow garlic to cool completely and then grind to desired consistency (I use a coffee grinder that I reserve only for spices). If you want to make sure that the powder is fairly even and fine, pass the ground garlic through a mesh strainer, catching the larger bits for a second pass through the grinder. Store finished powder in an airtight container in a cool, dark place.

Simple.