Here is one recipe from allrecipes.com (Make ahead Gravy)
Here is a video of Tyler Florence's recipe on Food Network (Tempting Turkey Gravy).
I'm giving you the video link because reviewers on Food Network complained that the Recipe shown there doesn't match what he did in the video.
I’ll never forget Tyler Florence the time he was talking about this fantastic cranberry sauce mold his mom makes. He said “I don’t know HOW she does it - it’s amazing! When she unmolds it, it comes out shaped like a can!” LOL!