01 - Toast the dried 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, smoked 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, then add the remaining beef broth and kosher 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 using two forks. Discard any 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 consommé fat, then place in the skillet. Top with shredded beef and cheese. Fold and cook until crispy and golden on both sides.
07 - Serve the tacos topped with diced white onion, chopped cilantro, and lime wedges, alongside a bowl of warm consommé for dipping.