The first step is to wash the mushrooms, or you can use a mushroom brush to clean them. I use a colander, that’s the easiest way for me to wash them. The second step is to slice the mushrooms about 3/8 inch thick. I tried using a wire mushroom slicer and it was useless. I used this mushroom/egg slicer, to begin with, but the mushrooms were too large. So, I just used a sharp knife to slice them evenly. Now, you place the sliced mushrooms evenly across the dehydrator racks.

I have an Excalibur Dehydrator that I set at 125 degrees F. Mine has a timer, but it’s not necessary if you’re willing to check on the mushrooms from time to time. When I purchased mine I knew I needed a timer because I always have a million projects going on at once.

These took about 4 hours to dry to a leathery texture. The drying time will depend on the humidity of the room where you are drying yours and the temperature setting.

Now, you can use a blender or a Magic Bullet shown below to turn the dehydrated mushrooms into a powder. I just pulsated the mushrooms until they were pulverized.