3. Grind into Powder
Once dried, place the skins in a spice grinder, high-speed blender, or mortar and pestle. Grind until you get a fine powder.
4. Store Properly
Transfer the onion skin powder into an airtight container. Store it in a cool, dark cupboard to preserve freshness. It can last up to 6 months if kept dry.
How to Use Onion Skin Powder
- In soups and stews: Add a spoonful for an extra kick of umami.
- Seasoning blends: Mix with garlic powder, chili powder, or herbs for a homemade spice mix.
- Roasted veggies: Sprinkle on potatoes, carrots, or squash before roasting.
- Homemade broth: Boosts the depth of flavor in vegetable or bone broth.
Extra Tips
- Mix red onion skin powder with yellow for a more colorful, slightly sweeter blend.
- Combine with salt to create a flavored onion salt.
- If you don’t use much powder, store extra skins in the freezer until you have enough to make a batch.
Final Thoughts
Making onion powder from skins is a brilliant zero-waste hack that turns kitchen scraps into a versatile seasoning. It’s easy, eco-friendly, and surprisingly flavorful. Next time you peel an onion, don’t throw away the skins — transform them into a homemade spice that will elevate your cooking!
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