Mix all ingredients together, then store in a labeled, dated container, it will last for 6 months in a cool, dry place.
Notes
If you want to try this, cook a test mushroom with my spice blend below. If you want it more spicy, add some cayenne, but it's easier to add spices to a blend than it is to remove. It took me 3 batches of trial blends to get one that I thought was balanced.Brushing the mushrooms with beaten egg white is optional, but will give you the best crust.