Clean the mushrooms using a paper towel to remove all dirt and cut out any impurities.

Slice the mushrooms into half a millimeter or quarter-inch slices and lay them on dehydrator trays in a single layer.

Place all the filled trays on top of each other and close the lid.

Set the dehydrator to 70 degrees Celsius (160 Fahrenheit) and dry for 6 to 8 hours, swapping trays from time to time to ensure even drying.