On a whim, I bought a bag of this at C-Mart (in the back where the seaweed and fermented black beans are). No mention of MSG on the label, just "mushroom extract" and salt, but this bag of dissolvable white pellets tastes surprisingly MSG-ish.
A tiny bit is not bad for upping the umami of a vegetarian noodle broth/miso soup.
Anyone cooked with this, or know what it is, or its traditional uses? Please clue me in.