
Reishi mushrooms are often used for their health benefits, which can be extracted through teas and tinctures. They are very tough and woody, so they need to be dried before use. There are several ways to do this, including using a food dehydrator, an oven, or air-drying. If you're using a dehydrator, slice the mushrooms and arrange them in a single layer on the trays, leaving space between each slice. Set the dehydrator to 110°F (43.3°C) and let it run for 2-6 hours, checking periodically until the mushrooms are completely dry. To dry reishi mushrooms in the oven, preheat to the lowest temperature setting (around 150-200°F) and thinly slice the mushrooms. Place them on a wire rack over a baking sheet and dry for 4-6 hours, or until crisp. You can also air-dry reishi mushrooms by thinly slicing them and placing them on a wire rack in a warm, dry place for several hours or overnight. Once the mushrooms are dry, store them in an airtight container in a cool, dry place.
| Characteristics | Values |
|---|---|
| Cleaning | Use a damp cloth or soft brush to gently wipe the mushrooms. Avoid using water as this can make the mushrooms soggy. |
| Freezing | Some sources recommend freezing the mushrooms for 24 hours before drying to kill off any parasites. |
| Cutting | Thinly slice the mushrooms. Use a serrated or sharp bread knife to gently saw through the dense, hard mushrooms. |
| Oven drying | Place the slices on a wire rack over a baking sheet. Put the baking sheet in the oven at its lowest temperature (150-200°F) for 4-6 hours or until crisp. |
| Air drying | Place the slices on a wire rack over a baking sheet. Leave in a warm, dry place, such as near a fireplace or in the sun, for several hours or overnight, until crisp. |
| Dehydrator | Arrange the slices on the dehydrator trays, leaving space between them. Set the dehydrator to 110°F and let it run until the mushrooms are dry (2-6 hours). |
| Storage | Store dried mushrooms in an airtight container in a cool, dry place. |
| Powdering | Once dehydrated, blend the mushrooms into a powder. |
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What You'll Learn

Cleaning and preparing reishi mushrooms
Before dehydrating reishi mushrooms, it is important to clean and prepare them properly to ensure their quality and safety. Here are some detailed steps to guide you through the process:
Firstly, inspect the mushrooms for any signs of insects, worms, or other pests. Mature reishi mushrooms have a hard outer shell, making them less susceptible to pest problems. However, it is always good to be cautious and carefully examine them.
Next, you can start cleaning the mushrooms. Avoid using water, as it can make the mushrooms soggy and prolong the drying time. Instead, opt for gently wiping them with a damp cloth or a soft vegetable brush. Alternatively, use a stiff brush, such as a toothbrush, to scrub and remove any dirt or debris. If there are stubborn spots, you can use a damp paper towel to wipe them off without soaking the mushrooms.
If you want to be extra cautious, freezing the mushrooms for 24 hours before drying can help kill off any parasites. This step is especially important if you plan to powder the mushrooms without heating them sufficiently to kill any parasites.
Once the mushrooms are clean and dry, it's time to slice them. Reishi mushrooms can be dense and hard, so use a sharp knife, preferably a serrated or sharp bread knife, to gently saw through them. The recommended thickness of the slices varies from source to source, ranging from thin slices to about a quarter of an inch thick. Remember, the thinner the slices, the faster they will dry.
After slicing, you can place the mushrooms on a wire rack over a baking sheet or directly on the baking sheet. If you use a baking sheet, consider using a basket or woven mat to allow air to circulate underneath the mushrooms, helping them dry more evenly. Make sure the slices are in a single layer and not stacked to ensure proper airflow.
Now that your reishi mushrooms are cleaned, sliced, and prepared, they are ready for the dehydration process. You can choose to dehydrate them in an oven, a food dehydrator, or by air-drying them in a warm, dry place.
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Drying reishi in an oven
Drying reishi mushrooms in the oven is a great way to preserve them for long-term storage. Before you start, clean your mushrooms by gently wiping them with a damp cloth or a soft vegetable brush. Avoid using water, as this can cause the mushrooms to become soggy.
Once your mushrooms are clean, use a sharp knife to slice them thinly, about a quarter of an inch thick. If you have antler reishi, you can simply break them up into smaller pieces. Place the slices on a wire rack over a baking sheet, making sure they are in a single layer and not overlapping.
Preheat your oven to a low temperature, between 150-200°F (65-75°C). Place the baking sheet with the mushrooms in the oven and dry them for 4-6 hours. Check the mushrooms after the first hour and flip them over to ensure even drying. Continue drying until they are crisp and brittle.
Remove the mushrooms from the oven and let them cool completely. Check to ensure there is no remaining moisture on the surface. If there is, blot it with a paper towel and return the mushrooms to the oven for another 30 minutes or until completely dry.
Once the mushrooms are fully dry, they should snap apart easily. Store them in an airtight container in a cool, dry place.
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Using a food dehydrator
Dehydrating reishi mushrooms is a great way to preserve them and extend their shelf life. Here is a step-by-step guide to using a food dehydrator to dehydrate reishi mushrooms:
Preparing the Mushrooms:
Before dehydrating, it is important to clean the mushrooms thoroughly. Use a damp cloth, a soft brush, or a wet paper towel to gently wipe or rub the mushrooms, removing any dirt or debris. Avoid soaking the mushrooms in water, as this can make them soggy and prolong the drying time. Some sources recommend freezing the mushrooms for 24 hours before dehydration to kill off any parasites, especially if you plan to consume them in powdered form without heating them to safe temperatures.
Slicing the Mushrooms:
Using a cutting board and a sharp knife, thinly slice the mushrooms. Reishi mushrooms can be dense and hard, so a serrated or sharp bread knife can help you gently saw through them. The thickness of the slices will impact the drying time, with thicker slices taking longer to dehydrate. Aim for slices between 1/4 to 1/2 inch thick.
Arranging the Slices:
Place the mushroom slices on the trays of your food dehydrator, ensuring they do not overlap or touch. Leaving space between the slices allows for better airflow, which is crucial for even and efficient drying. Depending on the number of mushrooms, you may need to dry them in batches.
Setting the Dehydrator:
Set the temperature of your food dehydrator to around 110 degrees Fahrenheit (or 45-52 degrees Celsius). This temperature range is ideal for dehydrating mushrooms as it prevents mould and spoilage while maintaining optimum flavour. Some sources recommend keeping the temperature below 140 degrees Fahrenheit to preserve nutritional and medicinal values.
Dehydrating the Mushrooms:
Place the trays of mushroom slices in the food dehydrator and let it run for 4-6 hours for 1/4-inch slices, or up to 8 hours for thicker slices. Antler Reishi mushrooms may take less time, drying in around 2-3 hours. Check the mushrooms periodically, and if they are not completely dry, continue dehydrating in half-hour increments until they are fully dehydrated.
Storing the Dehydrated Mushrooms:
Once the mushrooms are crisp and dry, remove them from the dehydrator and let them cool completely. Then, transfer the dried mushrooms to airtight glass jars or containers. Label the containers with the contents and the date of drying. Store them away from direct light or heat in a cool, dry place.
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Air-drying reishi mushrooms
Once you have sliced your mushrooms, place them in a single layer on a wire rack over a baking sheet. Place the baking sheet in a warm, dry place, such as a sunny spot or near a fireplace. It is important to find a location that is warm and dry to ensure that the mushrooms dry properly. Avoid placing the mushrooms in a humid or damp environment as this can cause them to spoil or develop mould.
Allow the mushrooms to dry for several hours or overnight, until they are crisp and brittle. This can take up to a day or two if you are drying them in the sun, so be sure to find a location with good airflow to help them dry more evenly. You may need to experiment with the drying time to find the optimal time for your location and the thickness of your mushroom slices.
Once the mushrooms are dry, store them in an airtight container in a cool, dry place. This will help to ensure that they last without spoilage. Moisture can cause even dried reishi mushrooms to rot or mould, so you may also want to add a desiccant to the container, such as a silica gel pack. Stored correctly, your dried reishi mushrooms can last for a year or more!
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Storing dried reishi mushrooms
Properly stored dried reishi mushrooms can last for several months to a year or more. To extend the shelf life even further, you can store the dried mushrooms in the freezer for up to a year. However, freezing may impact their quality and ability to dry evenly in the future.
Before drying, some sources recommend freezing the mushrooms for 24 hours to kill off any parasites, especially if you plan to consume the mushrooms without heating them sufficiently to kill parasites, such as in an alcohol or hot water extraction. However, freezing can make the mushrooms mushy and difficult to slice, potentially compromising the texture of the dried mushrooms.
It is important to note that fresh reishi mushrooms should be stored in the refrigerator in a paper bag and will only keep for up to a week.
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Frequently asked questions
The best way to dehydrate reishi mushrooms is to use a food dehydrator. Set the temperature to 110°F (43.3°C) and leave the mushrooms to dry for 3-6 hours.
An alternative method is to use an oven. Preheat the oven to its lowest temperature setting, usually 150-200°F (65-93°C). Place thinly sliced mushrooms on a wire rack over a baking sheet and put them in the oven for 4-6 hours.
Before dehydrating, clean the mushrooms with a damp cloth or brush. Avoid using water as this can make the mushrooms soggy. Some sources recommend freezing the mushrooms for 24 hours before dehydration to kill off any parasites.
Dehydrated reishi mushrooms can be used to make tea or tinctures. To make tea, grind the mushrooms into a powder and add one tablespoon to a cup of water. Simmer for 30 minutes to 2 hours.

























