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 soak for 10 minutes until softened.
02 - Combine the softened chiles, quartered onion, garlic cloves, quartered tomatoes, cumin, oregano, thyme, smoked paprika, cinnamon stick, whole 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 until the beef is fork-tender and easily pulls apart.
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 broth to create a clean consommé. Reserve the consommé 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 into a taco shape and cook until crispy and golden on both sides.
07 - Serve the crispy tacos topped with diced white onion, chopped cilantro, and lime wedges alongside a bowl of warm consommé for dipping.