I used the entire skein of Vanna's choice in Raspberry with size 9 needles.
This is worked flat, then seamed together.
To make the cowl wider or narrower, increase or decrease by multiples of 4.
Cast on 36 using long tail method.
Row 1: purl (right side)
Row 2: *(k1, p1, k1) in same stitch, p3 tog; repeat from * to end.
Row 3: purl
Row 4: *p3 tog, (k1, p1, k1) in same stitch; repeat from * to end.
Repeat rows 1-4 until the cowl is your desired length, or until you have nearly finished the yarn.
Purl one row. Cast off knit-wise.
Whip stitch the ends and enjoy your new cowl!