My wife added some powdered brown gravy mix to thicken it. (smilesandwich.com)
In the bowl of your slow cooker mix together cream of chicken soup, water, two packets of chicken gravy mix, onion flakes, garlic powder, salt and pepper. (newsouthcharm.com)
Add the remaining wine and mushroom gravy mix (or cornstarch) and simmer 20 - 30 minutes until thickened and reduced. (thecrumbykitchen.com)