Tips For Drying/Dehydrating Wild Mushrooms

dried lobster, morel, bolete, porcini,  and chaga mushrooms

Top to bottom: Morels, Chaga. Left to Right: Oak Bolete, Lobster Mushrooms, Porcini, Sulphur Bolete.

Natures seasonal bounty comes in consistent giant waves, and with many mushrooms, intense intermittent spurts throughout the year. You will, as I have many times in the past, have to figure out what you are going to do with all of your free food. Especially if you have been touched with mushroom fever. One of the easiest and time honored ways of preserving food, especially mushrooms, is drying and dehydrating them.

I have spoken on the individuality of each wild mushroom’s flavor and cooking methods a few different times. Their individual drying preferences and needs are varied as well. Morels, as they are hollow, take well to drying, but not near as quickly as a petite yellowfeet chanterelle, or a black trumpet would. Boletes, and slippery jacks in particular if they are to be dried must be attended to very quickly, almost immediately; to preserve them for future use.

I have tried to dry and preserve almost every mushroom I have come across, and have been the point man for drying and preserving large quantities of wild mushrooms for a professional restaurant for some time. Drying mushrooms at home isn’t as serious as it is in a professional restaurant, where many many pounds, (this week there was 100lbs of morels that came in) are dealt with, but a few little tips and tricks can save you from possible heartbreak in the event you were out on a very hot or wet day when picking.  Here are some tips I find helpful to remember:

Tips on drying wild mushrooms

  • Desication means dehydrating them without heat. Heat is the enemy of flavor in dried foods and will harm the perfume of mushrooms irreparably if used in excess. Mushrooms dried without heat will have the strongest perfume and aroma possible.
  • If you use a dehydrator to preserve your mushrooms, take a close look at the heat settings. When you turn the dehydrator on does the air feel warm? Each dehydrator is different ( I have an antique myself) and if the air at all feels warm on the lowest temp setting, open the door of the dehydrator during the preservation process.
  • With delicate mushrooms like slippery jacks, or mushrooms picked in the later stage of their life cycle, the heat created by dehydrators can actually speed up the decomposition process, especially if they do not have proper breathing room.
  • If your mushrooms are wet from rain or warm from being in a vehicle, before even thinking about processing, cooking, or cleaning them, lay them out comfortably on a cookie sheet and refrigerate them immediately, covered in a slightly moist towel or rag. They need to aerate, cool quickly, and breathe to retain their shelf life. Once they are cooled, you will have the best percentage of success drying them. This should only take half an hour or so in the fridge, or use the freezer if the weather has been particularly warm.
  • Slice your mushrooms you intend to dry very thinly, this will help them dry faster and also help them to have a better mouthfeel and texture when re-hydrated
  • When placing mushrooms in a dehydrator, make sure they do not touch each other, remember they retain heat, and air circulation is key; especially with slippery jacks.
  • Drying is a great way to salvage insect damaged mushrooms, or those that may be slightly imperfect if eaten fresh, “a la minute” (Immediately). After they are dehydrated, they can be ground into a flavorful powder that will create bouillons, rich compound butters, rubs and other things that are resourceful, not to mention delicious.
  • Mushrooms are done dehydrating when they are *cracker* dry, they should almost be brittle, if there are any in your dried collection that have soft spots still, just leave the top of whatever container you are going to store them open, that way they will continue to aerate. After a week or two you may put the lid back on, and should have no problems.

Drying Mushrooms without a dehydrator

You don’t have to have a dehydrator, but they’re nice to have. People have been drying food for eons this way, here are some tips.

  • Slice the mushrooms as thin as possible
  • Sliced mushrooms can be threaded with a needle and string, then you can hang them up and let them air dry outside, this is one of the oldest techniques.
  • Blow a fan on the mushrooms constantly, it may take days for them to be completely dry.
  • Laying sliced mushrooms on screens outside or in a dry place will work.
  • If the mushrooms feel even the slightest bit moist, leave them out for a while longer.


Are My Morels Rotten?

Absolutely, positively, hands down, this is one of the biggest problems I notice when I have been in the homes of other mushroom hunters, and possesses one of  the highest volume of searches I have noticed through google regarding wild mushroom preservation. I have been in the garages and man caves where the midwest morel hoards are kept and have witnessed personally the horror that is improper preservation. Smart, intelligent guys excitedly showing me their stashes, screens and blankets set up on sawhorses with morels strewn about, most of them black, soft, and putrid.

Seeing someone exited to inadvertently poison their families is a grating feeling. If your morels are dark, if they are soft and wet, if they smell different or foul, if they have been in your fridge for more than a week, you need to inspect them post haste! Here is a picture that will show the 3 stages of morels and their successful and unsuccessful preservation through drying.

how to dry morel mushrooms

Morels left to right: fresh, no good/rotten, and properly dried.


  1. sandra says

    hello, thank you for your description of Pluteus/Fawn. I was wondering your tips on drying mushrooms without a dehydrator. thanks!

    • says

      I made some changes to the dried mushroom post for you. You can set them up on screens, or really any way you want as long as they are getting good air flow. Blow a fan on them continuously until they are cracker dry.

  2. June says

    SO sadly my mushrooms look like the middle ones, and I’m not sure why they dry dark and small like that. I brought them home, left them in the fridge overnight in a paper sack, and put them on the dehydrator at a low heat setting. The ones I started drying outside first, then put in the dehydrator turned out fine. Live and learn, but when I borrowed a friend’s dehydrator they never turned out like that! Any ideas on what I’m doing wrong? My dehydrator has heat settings from 90-145 and I’ve tried various setting with the same results. ugh!

    • says

      The blackening is from the morels wilting and beginning the decomposition process as opposed to the drying process, they end up drying anyway, but their flavor won’t be as good, and it’s just not good practice. A sure fire way to fix it is to separate out morels you want to dry or are damaged immediately when you return home from hunting. You want the absolute lowest heat setting available on the dehydrator too. I’ve also found that some dehydrators are just too hot, and that they will do what you describe to mushrooms most of the time, especially with species like slippery jacks or short lived boletes. Opening the door while they’re dehydrating can help too. Also I use a harvest maid dehydrator, they’re tanks, but work really great. Good luck.

  3. Dale says

    I have Puffball mushrooms and I ground the up “fine” in a food processor. I put the ground mushroom in the oven and dried it into a very dry crumb. In the process of drying the ground white mushroom turned brown…..I probably had the oven a little warm. The whole process took four hours and the end product is a crisp tray of ground mushrooms which I will now grind again and add to soup.

    I worried that the dried mushroom turned brown in the drying process. Do you think it is safe to eat?



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