Add the chicken breasts to the bottom of a crockpot that is at least 3 quarts in size.
Combine the onion soup mix, cream of chicken soup, chicken broth, water, black pepper, flour, garlic powder, & poultry seasoning. Whisk it together well so that it’s well combined and smooth. Pour the mixture over the chicken breasts in your crockpot.
Cook on low for 6-8 hours or until the chicken is done.
Remove chicken from the pot, shred with a fork, and return back to the gravy.