I make my gravy with cornstarch. Also use this method to thicken stews and soups. Dissolve cornstarch in a little cold liquid then add to (defatted) drippings and broth. I vary the amount of cornstarch according to how thick I want the finished product. 1 T. per cup of finished liquid is thin, 2 T. makes medium and 3 T. makes thick. I never get lumps like I do when I try use flour...