Mushrooms

We've all been there. Standing in front of the spices in the grocery store.

Why is there no dried mushroom spice/flavor? I mean they can come up with a ton of different stuff, most of which most of us have never heard of. But mushrooms are delicious in everything from spaghetti, pizza, most other pastas, and a ton of other stuff, but we always have to buy mushrooms (which go bad quickly) for this addition. McDonalds even puts freeze-dried onions on some of their "fresh" burgers. Yeah.