The Brympton eBook contains the pattern for both mitts and cowl.
This cowl comes with matching mitts, and both can be knitted from one skein of the yarn.
Pattern includes full written instructions and would be a good project for someone new to knitting in the round.
If you plan to make both mitts and cowl, I recommend making the mitts first. That way, you can make the cowl as long as your remaining yarn.