In a large slow cooker, add chicken breasts trying to overlap minimally. Add chicken broth.
Sprinkle chicken breasts with all purpose seasoning and add butter on top.
Cover and cook on Low for 3-4 hours or on High for 2 hours, or until internal read thermometer reads 165 degrees F when inserted in the center.
Remove onto a cutting board, cover with foil and let rest for 5-10 minutes. Then shred and use in your favorite recipes. Can also add cooking liquid to rehydrate the chicken.
Notes
Store: In an airtight container in the fridge 3-4 days.
Reheat: In microwave or on the stovetop in a covered pan until warmed through.
Freeze: Up to 3 months in a freezer safe bag, thaw before using.
Here is a cooking time chart for reference:
Boneless chicken breasts - on Low for 3-4 hours or on High for 2-3 hours.
Bone-in chicken breasts - on Low for 4-5 hours or on High for 3-4 hours.
Chicken tenders - on Low for 2-3 hours or on High for 2 hours.