I’ll bet Michelle has never even heard of Filet Powder and thinks a Roux is something you buy in a jar.
No doubt, she's never heard of file powder, but you actually can buy roux in a jar. I've never used the stuff, but a lot of people have told me that it's good. Sounds crazy, I know. :)
It's file', as in Zataran's Gumbo File', (pronounced fee LAY).