Came across both these on Pinterest the other day..
The Black Hole Cowl by Laura Jansen. (This pattern is available as a Free Ravelry Download!!)
I just love the chunky yarn. I don't have any, and I must admit I was eyeing some off in my local yarn store last weekend....
I really love the button as well. One of my cowls is a bit too big and I've been considering popping on a button to tighten it up on cold mornings.