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How to Make Onion Powder

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Have you ever opened your pantry, only to find that you’re out of onion powder? It’s one of those staples that we use all the time, but sometimes forget to restock. That’s why I love making my own onion powder at home. Not only do I know exactly what’s in it—just onions, no fillers—but it’s also super easy to make, especially in small batches.

A small bowl of onion powder.
How to Make Onion Powder. Photo credit: Tiny Batch Cooking.

Plus, homemade onion powder has a much fresher and stronger flavor than store-bought versions. It’s the perfect way to use extra onions before they go bad.

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I remember the first time I made onion powder, after dehydrating and grinding those onions, I was amazed at how simple the process was. I never worry about running out because I can whip up a small batch when needed.

Dehydrator or Oven When Making Dried Onions

You can make onion powder using either a dehydrator or an oven. If you have a dehydrator, it’s a great tool for drying onions evenly without keeping a close eye on them. However, making onion powder in the oven also works if you don’t have one. All you need is a low temperature and a bit of patience.

Even if you use a dehydrator or oven, the key to success is ensuring the onions are fully dry before you grind them into powder. Any leftover moisture could make the powder clump up or spoil. Take your time, and soon you’ll have a fresh, fragrant batch of onion powder ready.

Making Homemade Onion Powder using Dehydrator

If you’re using a dehydrator, the process is incredibly hands-off. Cut the onions into thin slices, spread them evenly on the dehydrator trays, and let the machine do the work. It’s a great way to dry out onion pieces without worrying about burning or overcooking them.

Once the onion slices are fully dehydrated, they’ll feel completely dry, crispy and brittle. That’s when they’re ready to be ground into powder. The process is straightforward and leaves you with a small-batch onion powder that tastes amazing. You can do the same process with garlic powder as well.

A small bowl with onion powder and a big bowl of dehydrated onion flakes at the back.
A small bowl with onion powder.

Grinding Dried or Fresh Onions

After your onions are dried, grinding them into powder is fun. Use a food processor, spice grinder, or a small blender like a Magic Bullet. A mortar and pestle will also work if you don’t have a grinder, these kitchen tools are also easy to organize because of it’s sizes. Just ensure the onions are fully dry before grinding, ensuring a smooth, fine powder.

Grinding fresh onions directly doesn’t work well, as the moisture content is too high. Dehydrating them is the way to go, ensuring your powder is shelf-stable and easy to store.

Dehydrating Onions

Proper dehydration ensures that the onions dry out completely, leading to a finer, more consistent powder. Moist onions can result in clumps or uneven texture. Onion powder made from fresh onions might spoil quickly due to residual moisture. It intensifies the onion’s flavor, making the powder more potent and flavorful.

This concentrated flavor can enhance your dishes without adding bulk and make creative dishes. Dehydrated onions, like my own Italian herb mix, take up less space than fresh onions, making storage more convenient and helping to maintain an organized pantry. Dry onions are easier to grind into powder than fresh ones. Moist onions can be challenging to process and may clog grinders or blenders.

A small bowl with onion powder and a big bowl of dehydrated onion flakes at the back.
A small bowl with onion powder.

Easy Instructions for Making Onion Powder

Must-Have Tools for Your Kitchen

  • Dehydrator: Perfect for drying out onions evenly without worrying about overcooking them.
  • Magic Bullet: A Magic Bullet or small blender is ideal for grinding the dried onions into a fine, smooth powder. It’s quick, efficient, and doesn’t take up much space.

Key Ingredients:

  • Onions: You can use any type of onion—yellow, white, or red—all will work well for making onion powder.
  • Water: Just a little water to rinse your onions before slicing them. Make sure they’re completely dry before you start the dehydration process.

*Exact measurements are listed in the recipe card below.

Detailed Directions for Making Onion Powder

One: Prepare Onions

Start by peeling your onions and rinse them under cold water. Pat them dry with a towel to remove any excess moisture.

Ingredients for How to Make Onion Powder.
Ingredients for How to Make Onion Powder.

Two: Cut Onions, Separate and Dry

Chop the onions thinly so they dry evenly. Spread the chopped onion out on dehydrator trays or a baking sheet if using an oven. Make sure there’s space between the slices so air can circulate.

4 images of steps of slicing white onions and assembling them into the dehydrator.
Dehydrating white onions.

Three: Grind Dried Onions

Once your onions are fully dried and crisp, place them in your grinder or blender and pulse until they become a fine powder. If any larger pieces remain, sift them out and grind them again.

Grinding dried white onions into a powder.
Grinding dried white onions into a powder.

Four: Store Powdered Onions

Transfer your freshly ground onion powder into a container to preserve the onion flavor. A small glass jar or airtight container keeps the powder fresh and dry.

Pouring onion powder into a container.
Pouring onion powder into a container.

Pro Tips for Best Results

  • When making your onion powder, ensure your onions are fully dried before grinding to avoid clumping.
  • The best way to preserve onion powder is to store onion powder in an airtight container to maintain its freshness and flavor.
  • Use a high-quality grinder to get a fine, even powder for the best texture in your cooking.
  • A coffee grinder can be used to make onion and garlic powder
  • When scooping out the powder, use a dry spoon to avoid introducing moisture into the container.

Common Questions Answered

What Are the Perfect Pairings for Onion Powder?

Onion powder is a kitchen staple because it adds flavor to many dishes. Sprinkle it into soups, stews, or orange sauce to boost flavor, or mix it into rubs for meats and vegetables. Add this powder to your pantry essentials, together with the ranch dressing spice mix.

A small bowl with onion powder and a big bowl of dehydrated onion flakes at the back.
A small bowl with onion powder.
How to Properly Store Onion Powder?

Store DIY onion powder in a tightly sealed container to protect it from moisture and air, which can cause it to lose flavor and become clumpy.  Store the container in a cool, dry area away from heat sources, sunlight, and humidity. A pantry or cupboard works well. While it might seem like a good idea to refrigerate onion powder, it can introduce moisture and affect its texture. Room temperature storage is generally best. 

How Do I Freeze Onion Powder?

Freezing onion powder isn’t typically necessary, as it has a long shelf life when stored properly in a cool, dry place. However, if you want to freeze it for extra longevity or live in a humid area, place the container or bag in the freezer. Ensure it’s in a spot where it won’t be crushed or damaged. Clearly label the container or bag with the date of freezing. This helps you track how long it’s been in the freezer.

Additional Easy Small-Portion Recipes You’ll Love

If you’re a fan of small-batch cooking like I am, you can try plenty of other simple, homemade recipes. Check out this crispy fried onions or almond flour mug cake. They’re perfect for making enough for one or two without waste.

Hibiscus powder and nuts trail mix is also a perfect recipe for you to try. It is as simple as making onion powder.

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A small bowl with onion powder and onion flakes around. The image also includes text about how to make onion powder and a website URL.
A small bowl with onion powder

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A small bowl with onion powder and a big bowl of dehydrated onion flakes at the back.

How to Make Onion Powder

Zuzana Paar
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Have you ever opened your pantry, only to find that you're out of onion powder? It’s one of those staples that we use all the time, but sometimes forget to restock. That’s why I love making my own onion powder at home. Not only do I know exactly what’s in it—just onions, no fillers—but it’s also super easy to make, especially in small batches.
Prep Time 5 minutes
Cook Time 6 hours
Course Pantry
Cuisine American, International
Servings 3 Portions
Calories 15 kcal

Ingredients
 
 

  • 1 Onion
  • Water

Instructions
 

  • Start by peeling your onions and giving them a quick rinse under cold water. Pat them dry with a towel to remove any excess moisture.
  • Chop the onions thinly so they dry evenly. Spread the chopped onion out on dehydrator trays or a baking sheet if using an oven. Make sure there’s space between the slices so air can circulate.
  • Once your onions are fully dried and crisp, place them in your grinder or blender and pulse until they turn into a fine powder. If any larger pieces remain, sift them out and grind them again.
  • To preserve the onion flavor, transfer your freshly ground onion powder into a container. A small glass jar or airtight container works well for keeping the powder fresh and dry.

Notes

  • When making your own onion powder, make sure your onions are fully dried before grinding to avoid clumping.
  • The best way to preserve onion powder is to store onion powder in an airtight container to maintain its freshness and flavor.
  • Use a high-quality grinder to get a fine, even powder for the best texture in your cooking.
  • A coffee grinder can be used to make onion and garlic powder
  • When scooping out the powder, use a dry spoon to avoid introducing moisture into the container.

Nutrition

Serving: 1TeaspoonCalories: 15kcalCarbohydrates: 3gProtein: 0.4gFat: 0.04gSaturated Fat: 0.02gPolyunsaturated Fat: 0.01gMonounsaturated Fat: 0.003gSodium: 1mgPotassium: 54mgFiber: 1gSugar: 2gVitamin A: 1IUVitamin C: 3mgCalcium: 8mgIron: 0.1mg

Disclaimer

Please note that nutrient values are estimates only. Variations can occur due to product availability and manner of food preparation. Nutrition may vary based on methods of origin, preparation, freshness of ingredients, and other factors.

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By Zuzana Paar on December 29th, 2024
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About Zuzana Paar

I'm Zuzana, the creator of Tiny Batch Cooking. With my skills as a content creator, recipe developer, food writer, videographer, blogger, and photographer, I focus on small batch recipes that are easy and delicious. My aim is to help you enjoy cooking.

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