Gather the ingredients.
For a bone-in turkey, put all of the ingredients into a 5 to 6-quart crockpot.
Cover and cook for 2 hours on high. This helps the meat get through the danger zone of 40 F to 140 F more quickly.
Then reduce the heat to low and continue cooking the turkey for 4 to 5 hours or until the turkey registers 165 F on an instant-read meat thermometer. (Note: if you have a boneless turkey breast, when you reduce the crockpot heat to low, start checking the turkey after 1 to 2 hours. It may only need that much time to reach 165 F.)
Slice the turkey breast and serve it with the sauce that forms in the slow cooker.