Step 1

Place dried porcini mushrooms in the bowl of a food processor or into a high-powered blender. Blend the mushrooms into a fine powder. This usually takes about 2 minutes. (Use high speed on a blender)

Step 2

Do not open the lid right away. Allow the mushroom powder to settle for about two minutes. Add the salt, red pepper flakes, dried thyme leaves, and black pepper. Process until fine, about one minute.

Step 3

Again, allow the mushroom powder to settle for a few minutes. Remove the lid and spoon into a jar. Store at room temperature for up to six months.