I'm not sure what the rule is with double-dipping when it comes to knit cookies…
But I say you should just go for it! This sweet little Oreo, Newman O, or what-have-you, is so brainless to whip up, I don't even remember how long it took me to complete. Knit entirely in garter stitch, I can't imagine it too much over 1 hour. Trying to photograph it, I had so much fun, I took about 10 individual pictures that I wish I could use here… But I figured that would kinda be overkill.
See for yourself, these sandwich-creme cookies are irrisistable, and you can find a fantastically detailed tutorial on Craftster.com, complete with pictures and diagrams of almost every step.
So pour yourself a tall glass of frothy soymilk, and get knitting!