Step 1

Add the dried mushrooms to a high-powered blender, spice grinder or food processor and blend for 5-10 seconds, or until it turns into a fine powder.

Step 2

Add the granulated onion, mustard powder, salt, red pepper flakes, black pepper and thyme to a bowl with the mushroom powder.

Step 3

Stir to combine all of the ingredients.

Step 4

Cover and store in an airtight container in the pantry for up to 6 months.