01 - In a medium mixing bowl, whisk together the apple cider vinegar, lime juice, chopped chipotle peppers, adobo sauce, minced garlic, ground cumin, dried oregano, smoked paprika, ground coriander, ground cloves, kosher salt, and black pepper until well combined.
02 - Place the trimmed beef chuck pieces in the bottom of the slow cooker. Pour the prepared marinade evenly over the beef, turning the pieces to ensure thorough coating on all sides.
03 - Scatter the roughly chopped onion and bay leaves over the seasoned beef. Pour the beef broth around the perimeter of the slow cooker, avoiding pouring directly over the beef to prevent washing off the marinade.
04 - Cover the slow cooker and cook on the low setting for 8 hours or on the high setting for 4 to 5 hours, until the beef is fork-tender and shreds apart with minimal effort.
05 - Remove and discard the bay leaves. Using two forks, shred the beef directly in the slow cooker, mixing the shredded meat thoroughly with the accumulated cooking juices.
06 - Serve the barbacoa hot with warm tortillas, steamed rice, or your choice of toppings such as pickled red onions, fresh cilantro, and lime wedges.