Onion powder is a pantry staple made from dehydrated onions ground into a fine, aromatic powder. It adds savory depth to rubs, soups, and sauces without the prep work of fresh onions. This guide walks you through making your own onion powder at home, from selecting onions to packaging, plus practical tips for turning it into a small business.
Ingredients
- 5 lbs (2.3 kg) fresh onions (yellow, white, or red)
- Optional: 1 tsp (5 g) salt per 1 cup (120 g) finished powder
Instructions
- Peel and slice the onions. Cut off the root and stem ends, peel away the papery skin, and slice the onions into even 1/8-inch (3 mm) rings or half-moons. Uniform slices ensure even drying.
- Dehydrate the onions. Arrange the slices in a single layer on dehydrator trays. Set the dehydrator to 135°F (57°C) and dry for 6–8 hours, rotating trays halfway through, until the onions are brittle and snap cleanly when bent. If using an oven, set it to the lowest temperature (usually 170°F/77°C) and prop the door open with a wooden spoon; drying will take 8–10 hours.
- Cool and grind. Let the dried onions cool completely for about 15 minutes. Working in batches, pulse them in a spice grinder or high-speed blender until you achieve a fine powder. Sift through a fine-mesh strainer to remove any larger pieces; re-grind those pieces.
- Optional: Add salt. If you want a seasoned onion powder, mix in 1 teaspoon (5 g) of salt per cup (120 g) of powder. This is optional and not necessary for plain onion powder.
- Store or package. Transfer the powder to an airtight container, preferably glass, and store in a cool, dark place. For selling, package in small jars or resealable bags with a label listing the ingredients and date.
Tips
- Use a food dehydrator for best results. Ovens can work, but they often run too hot and may scorch the onions, giving a bitter flavor. If using an oven, keep the door ajar and watch closely.
- Dry thoroughly. Any remaining moisture will cause mold. The onions must be completely brittle—no bend—before grinding.
- Grind in small batches. Overfilling the blender or grinder creates heat, which can cause the powder to clump and lose aroma.
- Label with a batch date. Onion powder keeps well for up to a year, but it’s best within 6 months for maximum flavor. Always note the date on your packaging.
Serving Suggestions
Use your homemade onion powder to season roasted vegetables, sprinkle over popcorn, mix into burger patties, or stir into salad dressings and marinades. It’s also a key ingredient in many spice blends like ranch seasoning or BBQ rub.
Variations
- Roasted onion powder: Before dehydrating, toss the sliced onions with a little olive oil and roast at 400°F (200°C) for 15–20 minutes until lightly browned. Then dehydrate as directed. This adds a sweet, smoky depth.
- Garlic-onion blend: Combine equal parts onion powder and garlic powder for a ready-to-use all-purpose seasoning.
- Spicy onion powder: Add 1–2 teaspoons of cayenne or chili powder per cup of finished onion powder for a kick.
Storage and Reheating
Store onion powder in an airtight container in a cool, dark place (like a pantry) for up to 1 year. It does not need refrigeration. For longer storage, you can freeze it in a sealed bag for up to 2 years, but thaw it to room temperature before opening to prevent condensation. There is no reheating needed—just use it straight from the container. Always check for any signs of moisture or clumping, which indicate spoilage.
Frequently Asked Questions
Can I use a regular oven instead of a dehydrator? Yes, but it’s trickier. Set the oven to its lowest setting (usually 170°F/77°C), prop the door open with a wooden spoon to let moisture escape, and dry for 8–10 hours. Check frequently to prevent burning.
How long does homemade onion powder last? If stored properly in an airtight container away from light and heat, it will keep for up to a year. Its flavor will slowly fade, so it’s best used within 6 months.
Why is my onion powder clumping? Clumping happens when the powder absorbs moisture from the air. Make sure the onions are fully dehydrated before grinding, and store the powder in a completely dry container. You can add a food-safe desiccant packet to the jar.
Can I sell onion powder I make at home? Yes, but you must check your local cottage food laws. Many areas allow selling shelf-stable dehydrated products from home, but you may need a food handler’s permit and proper labeling. Always follow local regulations.
What’s the best onion variety for onion powder? Yellow onions give a balanced, classic flavor. White onions are milder, while red onions produce a slightly sweeter powder with a hint of color. Any variety works, so choose based on your taste preference.
Is onion powder the same as onion salt? No. Onion salt is a mixture of onion powder and salt, usually with an anti-caking agent. If a recipe calls for onion salt, use half the amount of onion powder and adjust the added salt accordingly.
Related
- Jin Soy Sauce: How to Use It in Cooking
- Japanese Black Pepper Chicken: Easy 30-Minute Recipe
- Japanese Cabbage Pancake (Okonomiyaki) Recipe
More recipes to cook
Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
Spotted an error? Tell us and we will correct it (corrections policy).