This was my grandpa's recipe. It is always a big hit as a Christmas present when you put it in a decorated metal tin. We have always had best results with name brand items such as Peter Pan, Jiff, and Reese's. The best chips I have used are either the semi-sweet or double chocolate by Ghirardelli. I have also used Nestle and Hershey's. The vanilla has to be pure not imitation for best results. Also, for best results, use a wooden spoon (for keeping an even temperature) and a non-stick pot.