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How To Make Your Own Onion & Garlic Powder

Homemade Onion and Garlic Powder

Almost exactly two years ago, I posted about making your own powdered eggs. At the time, I knew that eggs were only the tip of the iceberg when it comes to making your own dehydrated foods at home, and I had every intention of testing and posting additional recipes here on the blog. But life got busy, as it does, and I had all but forgotten my plan to feature more dehydrated foods. Until now! Also, check out this list of the 5 best foods to dehydrate.  Give them a try! Once you are done making onion and garlic powder of course! :-)

This idea caught my eye and reignited my excitement about making homemade powdered foods. As a lover of both garlic and onions, making my own garlic and onion powder at home sounded very enticing! For those of you who grow your own garlic or onions (or buy them in bulk seasonally,) finding a suitable place to store them can be difficult. Garlic and onions require cool, dark places with ample air circulation to prevent them from spoiling or sprouting. Powdering your garlic and onions is a simple solution to this problem, and it will save you a lot of space in your garage or cellar!

Compared to store-bought garlic and onion powders, homemade powders are much more flavorful and contain no added fillers. And they’re easy to make too! Give it a try for yourself!

Homemade Garlic & Onion Powder

Homemade Onion & Garlic Powder

Start by peeling your onions and/or garlic. Here’s a tip for quickly peeling garlic: place the cloves in a container with a tight-fitting lid, then shake the container forcefully for a minute or so. Pick out the loose skins, replace the lid, and keep shaking until all the skins have come off.

Homemade Onion & Garlic Powder

Slice the onions or garlic as thinly as possible. We used a mandolin slicer on it’s thinnest setting, but you could also use a vegetable peeler if you don’t have a mandolin.

Preheat your oven to its lowest temperature. The oven at our studio only goes as low as 170, but 150 is the recommended temperature.

Homemade Onion & Garlic Powder

Place a single layer of the garlic or onions onto a baking sheet, and place in the oven to dehydrate completely, for up to 4 hours.

Homemade Onion & Garlic Powder

Time will vary based on your oven heat and how thin your slices are, so just check on them every hour or so, removing the dry pieces as needed. They should be completely dry, and break quite easily.

Homemade Onion & Garlic Powder

When the garlic or onions are dry, grind them into a powder using a clean coffee grinder, a blender, a food processor, or with a mortar and pestle.

Homemade Onion and Garlic Powder

If there are still any large pieces in your powder after grinding, you can pour the powder through a sieve to remove them.

Homemade Onion and Garlic Powder

The amount of powder you end up with will vary greatly based on the size of your produce and its water content. For us, two onions yielded about a 1/4 cup of onion powder, and a head of garlic yielded 2-3 tablespoons of garlic powder.

Store the powder in an airtight glass jar. Use in any recipe that calls for garlic or onion powder, or use it to add additional flavor to just about anything.

Homemade Onion and Garlic Powder

Homemade garlic and onion powder will be more potent than store-bought powders, so I don’t recommend substituting the homemade stuff at a one-to-one ratio. Add a little bit of powder at a time, tasting as you go, until you achieve the desired flavor.

Homemade Onion and Garlic Powder

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    • Store bought can last 3-4 years. As far as homemade, it will not last as long. Depending on how long it’s dried and the container you use to store it, you can expect it to last for about a year.

  • I dehydrate both onions and garlic using my dehydrator; in this way, I can dehydrate them using a lower temperature. You can cut the onions or garlic into small pieces and simply dehydrate them (sweeter onions taste great and are a nice snack!) or you have the option to make the powder. I have one tip to add: make sure that your onions/garlic are COMPLETELY dehydrated/dry; if they are not, your powder will clump. If this happens, always smell it prior to using it. If it smells musty, don’t use it (obviously).

  • I dried 5 lbs of Vidalia onions, Wow! I couldn’t stop linking my fingers. They produce a wonderfully sweet onion taste. Great for sauces. Going to dry some regular onions so I can mix the powders as my recipe would require. Thanks so much Jillie!

  • Good idea. I don’t think I’d want to try it now. It’s starting to get hot and humid where I live. So it would make the house very warm. Maybe in cooler weather.

  • Jill, thank you fot your post. I am goig to try both onion and garlic. I live in Canada where the winter prices for vegetables andherbs are outrageous, so I hate paying &15 or more to make a soup or stew. I amgoing to try this method for celery, red and grenn peppers and rhubarb for my winter flavourings as well. Do you have any tips for dehydrating, but not powdering theveg? Any help would be appreciated. Thank you.

  • I remember reading that they hold their flavor longer if you don’t powder them until you’re ready to use them. Or at least don’t powder a years worth at once. If you have a food dehydrator, try and dry the onions outside of the house or use plenty of ventilation.

    • I was just about to post a warning about dehydrating onions and garlic! I’ve done both in my dehydrator and was stunned at the overwhelming odor of both in my tiny (650 sq ft) apartment! It went away after a couple of days, but I didn’t mind…it was well worth it to have homemade :)

      Thanks for all you do, Jillee…I’ve learned so very much from all your hard work..know you are madly appreciated!

  • I also do this with celery, chives and colored carrot peels to use for natural food coloring. My grandson and granddaughter can not have red food 40. Thank you for sharing this great post!!

    • Hi Barbara…I’m a MySpiceSage fanatic too! I just received a large envelope with several items…one being a large pkg of arrowroot powder. The bag was damaged and I had arrowroot all over everything! I sent an email to let them know, with pics showing the “mess”…and they replied almost immediately…replacing the entire order! I really love these guys….and if you haven’t tried their garlic bread seasoning…its the best I’ve ever tried! I tend to use offensive amounts of garlic, lol…and this is the best garlic seasoning ever :) I’ve used it on chicken, fries…heck, that stuff would taste good on a bumper! LOL

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