01 - Toast the guajillo, ancho, and pasilla chiles in a dry skillet over medium heat for 2 to 3 minutes until fragrant. Transfer to a bowl, cover with hot water, and let soften for 10 minutes.
02 - Combine the softened chiles, onion, garlic, tomatoes, cumin, oregano, thyme, paprika, cinnamon stick, cloves, bay leaves, peppercorns, apple cider vinegar, and 1 cup beef broth in a blender. Blend until completely smooth.
03 - Place the beef chuck chunks and short ribs in the slow cooker. Pour the blended sauce over the meat, then add the remaining beef broth and salt. Stir to coat the meat evenly.
04 - Cover and cook on low for 8 hours, or until the meat pulls apart easily with a fork.
05 - Remove the beef from the slow cooker and shred with two forks. Discard the bones. Skim excess fat from the surface of the cooking liquid, then strain the consommé through a fine mesh and reserve for dipping.
06 - Heat a skillet over medium heat. Lightly dip each corn tortilla in the fat skimmed from the consommé, then place on the skillet. Add shredded beef and cheese to one side, fold in half, and cook until crispy and golden on both sides.
07 - Arrange the crispy tacos on a platter and top with diced white onion, chopped cilantro, and lime wedges. Serve with a bowl of warm consommé alongside for dipping.