Slow cookers are great for cooking certain cuts of meat until they easily pull apart (i.e. chicken thighs). Chipotle in adobo adds a bold layer of smoke and heat to many Mexican dishes, so we’re adding some to this barbecue sauce to dial up the flavor.
Using chicken thighs is key here as they stay moist and become incredibly tender during the long, slow cook, perfect for pulling. Don't skip the step of crisping the pulled chicken in the skillet; this adds crucial texture contrast to the saucy, tender meat. A fat separator makes defatting the cooking liquid easy, but you can simply skim the fat carefully with a spoon. Adjust the amount of chipotle based on your preferred heat level. Ensure your broiler is fully preheated for quick cheese melting without burning the buns.