How to Dehydrate Mushrooms for Long-Term Storage

When properly dried and stored, mushrooms can last for more than a year without losing their potency or flavor. The goal is to remove every drop of moisture to prevent mold and decay.

1. The Dehydration Process

The golden rule of mushroom storage is that they must be completely dry. Even a tiny amount of internal moisture will cause the entire jar to rot over time.

The "Bend Test"

How do you know they’re done? Use the Cracker Dry test:

• Test: Attempt to bend the mushroom.

• Result: It should have zero "give" and snap immediately when force is applied. If it feels leathery or bends at all, it needs more time.

Why You Need a Dedicated Dehydrator

While there are several DIY methods for dehydrating mushrooms you can find online, most experienced cultivators (including myself) will tell you to avoid them. I’ve seen too many people ruin their beautiful mushroom harvests because they tried using a fan, oven or air fryer instead of a dehydrator.

The good news is that dehydrators are super affordable and you can find one for as cheap as $40 new. Goodwill and facebook marketplace have some even cheaper if you have the time.

You can also use it for making all types of food, snacks and pet treats. I like to dehydrate cheap cuts of meat for dog treats. I also use it to dry my filament for 3d printing.

 

2. Temperature and Time

Setting your dehydrator correctly ensures you don't degrade the mushroom's beneficial properties through over-heating or slow oxidation.

Temperature Settings

There is some debate on the "perfect" temp, but generally, a range between 115°F (46°C) and 170°F (76°C) works well.

I run mine at 170°F (76°C). It dries the mushrooms quickly, and I haven't seen any loss in quality or potency.

Timing Your Dry

The time required depends on the size and thickness of the mushrooms. If your mushrooms are really thick then they will take longer to fully dehydrate. You can run the dehydrator longer or slice them into thinner pieces for faster drying.

• Initial Check: Check your mushrooms at the 12-hour mark.

• Intervals: If they aren't "cracker dry," check every 4 hours after that.

• Safety Net: You can’t really "overdry" them. Setting the timer for 24 hours ensures they are finished, but be ready to store them as soon as the machine stops so they don't re-absorb moisture from the air.

 

3. Storage

To keep your mushrooms fresh for a year or more, you must protect them from air, water, temperature, and light.

• Air: Use a Mason jar with a tight-fitting lid. Unlike Ziploc bags, glass jars are truly airtight. Any container you can completely seal will work (like vacuum sealing).

• Water (Silica Packets): Add a food-grade desiccant/silica packet to the jar. This absorbs any lingering moisture in the air.

• Note: Keep your spare silica packets sealed as well so they don't "fill up" on moisture before you use them!

• Temperature: Keep them at room temperature. Avoid extreme heat or freezing, as both can degrade the mushrooms.

• Light: Store your jars in a cupboard or drawer. UV light from the sun can break down the beneficial compounds.

 

Quick Summary

1. Prep: Space mushrooms evenly in the dehydrator.

2. Dry: Run at 170°F (76°C) for 12–24 hours until "cracker dry."

3. Jar: Place in a Mason jar with a silica packet.

4. Store: Keep in a dark, room-temperature cupboard.

Bonus Tip: Once fully dehydrated, you can use a cheap coffee grinder to turn your mushrooms into powder for easy consumption or to fill your own capsules!