These days I just can't bring myself to use a can of soup in a recipe that I have gone to the trouble of making sure is real food. So, I looked around to find a good, fast substitute.
Basically, I found that I can make a white sauce and substitute the milk with chicken stock and I have cream of chicken soup! It also makes a great gravy to put on mashed potatoes.
Melt 4 T butter. Add 4T of flour. Mix. Slowly whisk in 1 cup of chicken stock. This should thicken. Now I have soup to add to my favorite recipes.