Place the barbecue sauce into a quart size freezer bag.
Take chicken cut into serving size pieces.
Place the chicken into a zipper freezer bag.
Squish the chicken around inside the bag to distribute the barbecue evenly over the chicken pieces.
Label zipper freezer bag with contents and date.
Freeze until ready to prepare.
Thaw the barbecue chicken in the refrigerator.
Dump the chicken with the sauce into a slow cooker and cook on low for 6-8 hours or until cooked through or on high 3-4 hours or until cooked through.
Serve with mashed potatoes and green beans.