Spray crockpot with cooking spray and place in the chicken breasts. Cut up butter into pieces and place on top of the chicken. Pour ranch dressing over the top.
Cook chicken in crockpot on high for 3-4 hours or low 5-7 hours.
It’s done when it’s so tender it just flakes apart with a fork. The internal temperature that’s considered safe for cooked chicken is 165 degrees Fahrenheit.
Once you take out the chicken breasts, scoop out the sauce, whisk it, and serve over your chicken breasts like gravy