Can You Freeze Dry Onions?
Yes. Onions freeze dry well into flakes and powder, though they're strong-smelling while drying.
Freeze Drying Suitability
This freeze dries well. Onions are watery and low in fat, so they dry into concentrated, flavorful flakes.
How to Prepare It
Peel and dice or slice thin. Arrange everything in a single, even layer on the trays so it dries uniformly.
Expected Texture
Crisp and light; easily crushed into flakes or powder.
Storage
Once fully dry, seal it in Mylar bags with an oxygen absorber and keep it cool, dark and dry. Because it is low in fat, properly sealed it stays shelf-stable for a very long time.
Rehydration
Add straight to soups and cooking, or grind into onion powder.
Common Problems
The strong aroma can transfer to other foods; dry onions in a separate batch.
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