Easy Slow Cooker Smothered Chicken

  to 2 1/2 lbs boneless skinless chicken breasts

condensed cream of mushroom soup – (or make homemade condensed cream of mushroom soup)

condensed cream of chicken soup (or make homemade condensed cream of chicken soup)

packet (1 ounce) Lipton Onion Soup Mix or store brand (or make homemade dry onion soup mix)

sliced mushrooms (fresh or canned  – if using canned, be sure to drain)

water

pepper