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 of 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, add the remaining beef broth and salt, and stir to coat everything evenly.
04 - Cover and cook on low for 8 hours, or until the meat is fork-tender and easily pulls apart.
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 sieve and reserve for dipping.
06 - Heat a skillet over medium heat. Lightly dip each corn tortilla in the reserved consommé fat, place in the skillet, and top with shredded beef and cheese. Fold in half and cook until crispy and golden on both sides.
07 - Plate the tacos topped with diced white onion, chopped cilantro, and lime wedges. Serve alongside a bowl of warm consommé for dipping.