With a N hook, make a chain as long as you want the blanket to be. Hdc in the 2nd chain from hook. Hdc across. Turn, ch 2, hdc across in back loops only. At the end of each row, I hdc'd in both loops for the last stitch. Continue rows of hdc in back loops until lapghan is as long as you want. I finished the first blanket with 2 rows of dc around. I love the ridge effect hdc'ing in the back loop creates.