It is double crochet with the last row single crochet. I think she told me it was 12 double crocheted rows with a single crochet on the finishing row.
So far this has been really nice. I have greatly enjoyed this. I have just left it right there on my skillet. I take it off to clean it and put it right back on. That is sausage gravy there in the pan.
I think I will send one of these to my friend. She is an avid camper and this would be nice for all her cast iron.