I've used yogurt several times for the "glue" that holds the rub on. However, my tub of yogurt expired a week ago. It was either mustard or try the sour cream. The sour cream will be used again. It gives a very mild flavor, doesn't burn or get weird at low and slow temps, and hold the rub and goodies on like a champ. It doesn't take much either. Give it a try and I'll bet you guys will like it.