Begin by soaking the dried guajillo and ancho peppers in hot water for about 15-20 minutes until they soften. Drain and transfer to a blender.
Add the minced garlic, chopped onion, cumin, oregano, smoked paprika, black pepper, salt, apple cider vinegar, and about 1 cup of beef broth to the blender. Blend until smooth to create the marinade.
In the crockpot, add the beef chunks and pour the blended marinade over the top, ensuring all the pieces are well-coated.
Add the remaining beef broth and bay leaves to the crockpot. Stir slightly to combine.
Cover and cook on low for 8-10 hours or on high for 4-6 hours until the beef is tender and shreds easily.
Once done, remove the beef chunks from the crockpot and shred them with two forks.
Return the shredded beef to the pot and stir it into the broth to keep it moist.
To serve, warm the corn tortillas over a skillet or open flame. Fill each tortilla with the birria beef and garnish with chopped cilantro. Serve with lime wedges on the side for squeezing.
Notes
Serve the tacos with a small bowl of the flavorful broth for dipping, adding a fresh touch with additional lime wedges and cilantro on the side.