Oh, I should have included that info. Thanks for asking.
I used lace patterns from the Harmony Guides Lace & Eyelets: 250 Stitches to Knit (published by Interweave Press).
Here's what I did:
I knit these lengthwise, by the way (I figured it wouldn't really matter with the patterns I was using--besides, who says all the patterns have to run vertical anyway?).
I knitted 2 rows to start off. Then for the body of the cowl, I did 2 knit stitches every row at the edge (for border), the lace pattern, and 2 knit stitches every row again at the edge. Finally, I ended with 2 more rows of knitting.
Then I sewed the buttons on one end and crocheted loops on the other (although I suppose that could have been knitted, too).
All in all, these are an easy knit: They take a lot less time than a scarf (I estimated about 17-18 inches per cowl), and they're really fun to work and easy to transport.
The great thing is that you can make these with any pattern (as long as the pattern repeats aren't too wide for the cowl you have in mind).