01 -
Soak dried guajillo and ancho chilies in hot water for 15 minutes. Combine drained chilies, onion, garlic, and diced tomatoes in a blender and blend until smooth.
02 -
Place beef chuck pieces into the slow cooker. Pour the blended chili mixture over the beef. Add beef broth, apple cider vinegar, dried oregano, ground cumin, bay leaves, salt, and black pepper.
03 -
Cover and cook on low setting for 8 to 10 hours until the beef is very tender.
04 -
Remove cooked beef from the slow cooker and shred using two forks. Return the shredded meat to the sauce, stirring to coat evenly.
05 -
Heat oil in a large skillet over medium heat. Dip each corn tortilla in the top fat layer from the slow cooker broth, then fry in the skillet until crispy and golden on both sides.
06 -
Add shredded beef mixture to each tortilla, fold in half, and fry again until both sides are crisp.
07 -
Serve birria tacos hot with a side of reserved broth for dipping, and garnish with chopped cilantro and diced onion as desired.