Flavacol and butter flavored coconut oil. Tastes just like the movie theaters. No story.. Just learned about Flavacol at work one day when we were talking about the best way to make popcorn. It's basically just powdered salt.
It's cheeselike. It's a similar flavor profile but it doesn't actually taste like cheese. It's tasty though, I like it with a bit of margarine in grits too.
I bought some for a vegan gravy recipe (that was shockingly decent, btw), didn't need most of it and have been slowly using the bag since Thanksgiving. A little goes a long way.