How to Dehydrate Mushrooms for Backpacking Meals

By Inga Aksamit & Aaron Owens Mayhew, MS, RDN, CD • Updated October 22, 2022

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Learn how to safely dehydrate or freeze-dry mushrooms for backpacking meals and enjoy a Veggie Pho Noodle Soup recipe! #howtodehydratemushrooms #howtofreezedrymushrooms #dehydratedmushrooms #backpackingmealideas #howtodehydratefood #backcountryfoodie

Drying Instructions | Storage | Veggie Pho Recipe

Learning how to dehydrate mushrooms at home is easy! Dehydrated mushrooms are a great way to add a new flavor to your DIY backpacking meals. Many cuisines value mushrooms for their savory taste and hearty texture. Because they are so pale, people often view them as filler vegetables that lack nutritional value. In fact, mushrooms pack a lot of nutrition. They are an excellent source of B vitamins and are the only plant source of vitamin D (certain varieties only). In addition, they contain antioxidants that help keep the immune system strong. You can add dehydrated mushrooms to practically any dish. They are especially delicious in pasta, risotto, and soups.

Read on for a step-by-step guide to dehydrating mushrooms. Interested in dehydrating other ingredients for DIY backpacking meals? Check out our similar posts on dehydrating green onions, tofu, and chickpeas.

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What types of mushrooms can you dehydrate or freeze-dry?

Fresh and cans mushrooms can be safely dehydrated or freeze-dried. Never dehydrate wild mushrooms you find unless you have a way to confirm that they are safe to eat. Some mushrooms are very poisonous!

Should mushrooms be blanched before drying?

You don’t have to blanch mushrooms before drying them. To improve quality, you should blanch most fresh vegetables in boiling water before dehydrating them. Once vegetables are picked, they release enzymes that lead to a natural deterioration in flavor and texture, even when dried. Blanching slows or stops the enzyme activity and relaxes the cell tissues. This allows the food to dry faster, protects the vitamin content, reduces rehydration time, and destroys potentially harmful bacteria. Taken all together, blanching is a worthwhile effort.

Blanching is recommended for tomato halves, summer squash, zucchini, greens, cabbage, cut corn, green beans, celery, fresh peas, and diced carrots.

Blanching is not required for sliced tomatoes, mushrooms, garlic, onions, scallions, parsley, okra, and peppers.


How do you dehydrate or freeze-dry mushrooms?

Step 1: Prepare the mushrooms for drying.

  • Clean the mushrooms thoroughly and pat dry.
  • Slice the mushrooms into small but uniform pieces. An egg slicer works great for this.

Step 2: Prepare the trays.

  • Spread the cut mushrooms onto dehydrator trays using mesh tray liners or parchment paper.
  • Tray liners are not necessary if using freeze-dryer trays.
Learn how to safely dehydrate or freeze-dry mushrooms for backpacking meals and enjoy a Veggie Pho Noodle Soup recipe! #howtodehydratemushrooms #howtofreezedrymushrooms #dehydratedmushrooms #backpackingmealideas #howtodehydratefood #backcountryfoodie
Dehydrator Tray
Learn how to safely dehydrate or freeze-dry mushrooms for backpacking meals and enjoy a Veggie Pho Noodle Soup recipe! #howtodehydratemushrooms #howtofreezedrymushrooms #dehydratedmushrooms #backpackingmealideas #howtodehydratefood #backcountryfoodie
Freeze-Dryer Tray

Step 3: Begin the drying process.

  • Dehydrate at 125℉ (51℃).
  • If freeze-drying, start the freeze-dryer and allow it to run its cycle.

Step 4: The mushrooms are done when completely dry.

  • The dehydration process will take approximately 4-8 hours or longer, depending on the humidity.
  • The freeze-drying process will take approximately 12-15 hours.

Step 5: Prepare the dried mushrooms for long-term storage.

  • For dehydrated mushrooms, allow the mushrooms to cool for 30-60 minutes. Then package in an air-tight container.
  • For freeze-dried mushrooms, package the mushrooms immediately in an air-tight container.
  • Once dried, the mushrooms will reabsorb moisture from the air, so do not leave them out for more than an hour.
  • To lengthen the shelf-life of the mushrooms, consider vacuum sealing them in vacuum seal bags, mylar bags, or mason jars.
  • You can purchase a mason jar vacuum sealer accessory online.
  • Also, consider adding an oxygen absorber. Oxygen absorbers will remove any extra oxygen from your container.

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    What is the yield?

    • The yield can vary quite a bit based on the size of the mushrooms.

    How do you rehydrate dried mushrooms?

    • Add hot water and cover for 5-10 minutes.
    • Cold water may be used, but rehydration will take longer.

    How long will dehydrated or freeze-dried mushrooms last?

    • Dehydrated mushrooms can be stored for six months in an airtight container kept in a cool, dry, dark area.
    • You can store freeze-dried mushrooms for 10-15 years when vacuum sealed with an oxygen absorber.

    What’s the best way to use dehydrated or freeze-dried mushrooms in backpacking meals?

    • Dried mushrooms can be used in various DIY backpacking meals to boost flavor without adding additional weight.
    • Powdering mushrooms in a coffee or spice grinder is a great way to flavor meals without adding bulk.

    Here are a few of our favorite recipes using dried mushrooms.

    Give this Backcountry Foodie mushroom recipe a try!

    Veggie Pho Noodle Soup

    Backcountry Foodie Recipe
    This recipe is a staple in my backpack and at home on weeknights. It's that good!
    Rate This Recipe
    5 from 2 votes
    View Comments / Leave A Review

    NUTRITION (per serving)

    cal/oz 98
    cal/gram 3.6
    Calories 364 kcal
    PROTEIN 12 g
    CARBS 76 g
    Fiber 10 g
    Added Sugar 6 g
    Fat 2 g
    Sodium 1940 mg
    Home Prep Time 9 hrs
    Field Prep Time 5 mins
    WT/SERVING 3.7 oz (102 g)
    Diet TYPESDairy-Free, Nut-Free, Vegan
    Servings2 servings



    • 4 cups broccoli, fresh florets, roughly 1 head of broccoli
    • 2 cups cabbage, fresh shredded, coleslaw mix works just fine
    • 1 ½ cups mushrooms, fresh white, sliced, approximately 8 oz container
    • 1 small onion, fresh yellow, thinly sliced
    • 1 cup carrots, fresh shredded, pre-shredded carrots in a bag work just fine
    • 1 bunch green onions, fresh, chopped, tops only




    INSTRUCTIONS (per serving)


    • Bring a stockpot of water to a boil.
    • Add the broccoli, cabbage, and carrots to the stockpot.
    • Blanch the vegetable mix for 3-4 minutes after returning to a boil.
    • Drain the vegetable mixture and rinse with cold water to stop the cooking process.
    • Spread the mixture onto two dehydrator trays.
    • Spread the sliced yellow onion, green onions, and mushrooms onto separate dehydrator trays.
    • Dehydrate vegetables at 125℉ (52℃) for 4-8 hours or until completely dry. The time required to dry the vegetables will vary based on the humidity in your home.
    • Divide the dried vegetables into two servings and store them in two bags or containers to be used in the backcountry.
    • Divide the noodles into two servings. Add one serving of noodles to each serving of vegetables.
    • Divide the dry broth ingredients into two servings. Add one serving of broth to each serving of vegetables.
    • Pack the soy sauce, hoisin sauce, and sriracha (optional) separately.


    • Bring 16 oz (480 mL) of water to a boil.
    • Remove the pot from the stove and add the soup mixture, soy sauce, hoisin sauce, and sriracha (optional) to the pot.
    • Stir to mix well and cover the pot with a lid.
    • Let the soup stand for 5 minutes to allow the vegetables and noodles to rehydrate.
    • Stir occasionally to make sure the noodles are completely covered with hot water.
    • Once fully rehydrated, stir to mix well, and enjoy!



    • Dehydrated or freeze-dried tofu is a great way to add protein and calories to this meal.
    • Instructions for dehydrating tofu:
      • Freeze the tofu overnight in the container that was purchased.
      • Allow the tofu to thaw completely in the refrigerator.
      • Cut the tofu into 1/2″ cubes and place on dehydrator trays.
      • Dehydrate at 135℉ (57℃) for 4-8 hours or until completely dry. The tofu should break in half easily, rather than bending.
      • Dehydrated tofu can be stored for 1-2 weeks in an airtight container kept in a cool, dark, dry place, 6 months in the refrigerator, or 12 months in the freezer. The short shelf-life is due to the fat content of the tofu.



    • Be aware that this recipe prepares two large, low-calorie servings of soup.
    • Total sugar (per serving): 13 g, including 6 g of added sugar from the hoisin sauce
    • To reduce sodium by 1638 mg, use sodium-free bouillon and low-sodium soy sauce.


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    Learn how to safely dehydrate or freeze-dry mushrooms for backpacking meals and enjoy a Veggie Pho Noodle Soup recipe! #howtodehydratemushrooms #howtofreezedrymushrooms #dehydratedmushrooms #backpackingmealideas #howtodehydratefood #backcountryfoodie

    Are you new to dehydrating food for backpacking meals?

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    Inga Aksamit is a Northern California-based author and backpacker who writes about exploration, adventure, and eating well on the trail. She focuses on creating delicious gourmet meals with healthy, wholesome ingredients and no-fuss preparation in the backcountry. She has written several books, including “The Hungry Spork: A Long Distance Hiker’s Guide to Meal Planning” and “The Hungry Spork Trail Recipes.”

    Aaron Owens Mayhew, MS, RDN, CD, is a registered dietitian and ultralight long-distance backpacker with over 20 years of nutrition and backpacking experience. She’s also the founder and owner of Backcountry Foodie, an online ultralight recipes and meal planning platform for backpackers. She also enjoys teaching hikers about backpacking nutrition via virtual masterclasses, YouTube videos, and podcast episodes. You can follow Aaron’s adventures in the kitchen and the backcountry via Instagram and Facebook.



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