What Foods Can You Freeze-Dry (and Which to Avoid)

Most foods freeze-dry well: fruits, vegetables, meats, dairy, entire meals, and even desserts. The main exception is anything with a lot of free oil, since a freeze dryer removes water, not oil.

Foods That Freeze-Dry Well

Fruits, vegetables, meats, dairy, whole meals, and desserts all hold up well in a freeze dryer. For specific guidance by category — how meat, produce, dairy, and herbs each behave and what to watch for — see a guide to freeze-drying meat, produce, dairy, and herbs.

Foods to Avoid

Freeze-drying works by pulling water out of food, but it doesn't touch oil. Foods with a lot of natural or added oil don't preserve well as a result — skip peanut butter, pure chocolate, butter, honey, syrup, and jam.

Tips for Better Results

Peel or halve fruits and vegetables before freeze-drying for more even results. For small items like grapes, cut them in batches by placing them between two plastic lids and slicing through with a bread knife — the same trick covered in more detail in freeze-drying grapes.

Blanch potatoes before freeze-drying — skip this step and they'll oxidize and turn black. Liquids like soup and broth can go straight onto the trays without any prep. Processing times vary by food, so don't expect every batch to take the same number of hours. Parchment paper or silicone mats make trays easier to clean afterward.

Label any fish, meat, or eggs that haven't been cooked before freeze-drying — freeze-drying doesn't kill bacteria, so raw freeze-dried food still needs to be handled and cooked the same as any fresh raw version. And since freeze-dried food keeps for up to 25 years when packaged properly, it's a good reason to stock up when something you use often goes on sale.

Frequently Asked Questions

What foods should not be freeze-dried?
Oily foods don't freeze-dry well, since a freeze dryer removes water but leaves oil behind. That rules out peanut butter, pure chocolate, butter, honey, syrup, and jam.

Do you need to blanch potatoes before freeze-drying?
Yes — unblanched potatoes will oxidize and turn black. A quick blanch beforehand prevents that.

Does freeze-drying kill bacteria in raw meat, fish, or eggs?
No. Freeze-drying only removes moisture. Label raw freeze-dried proteins clearly and handle and cook them exactly as you would any fresh raw version.

How long does freeze-dried food last?
Up to 25 years, if it's packaged properly in an airtight container like a mylar bag with an oxygen absorber.