Use the Tunisian “knit” stitch. A good tutorial can be found here. Row 1: ch 15 for a narrow scarf, or 42 for wider “movie” size. Insert the hook into the 2nd ch from hook, yo, and pull ...

To knit this chunky scarf, you'll use the following stitches: Cast on 21 sts using 12mm needles and Yarn A. Knit 1 row. Foundation row Kfbf, *k3tog, kfbf; rep from * to end. **Change to Yarn B.