stir together the barbecue sauce, apple cider vinegar, maple syrup and chili powder in the base of a slow cooker. then add the chicken breasts, turning to coat in the sauce.
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put the lid on the slow cooker, then cook on low for 3-4 hours.
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use an electric hand mixer or two forks to shred the chicken. then return to the slow cooker, tossing it back up in the sauce.
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BBQ pulled chicken is typically served on a bun with slaw.
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