Ingredients
Equipment
Method
Prepare the Chiles
- Heat a dry skillet over medium heat.
- Toast the guajillo, ancho, and chile de árbol for about 15 to 30 seconds per side, just until fragrant. Do not let them burn.
- Transfer the chiles to a bowl and cover with hot water.
- Let them soften for about 15 minutes.
Make the Birria Sauce
- Add the tomatoes, onion, and garlic to the skillet and lightly brown them.
- Transfer the softened chiles, tomatoes, onion, garlic, 1 cup hot water, apple cider vinegar, oregano, cumin, cinnamon, cloves, and a pinch of salt to a blender.
- Blend until completely smooth.
- Strain the sauce through a fine-mesh strainer for a smoother consommé.
Brown the Oxtail
- Pat the oxtail dry with paper towels.
- Season with kosher salt and black pepper.
- Heat the oil in a large skillet over medium-high heat.
- Brown the oxtail in batches for about 2 to 3 minutes per side.
- Transfer the browned pieces to the slow cooker.
Slow Cook the Oxtail
- Pour the birria sauce over the oxtail.
- Add the beef broth and bay leaves.
- Cover and cook on LOW for 8 to 9 hours, or until the meat pulls easily away from the bones.
- Remove the oxtail from the slow cooker and let it cool slightly.
Shred the Oxtail
- Remove the meat from the bones.
- Discard the bones, bay leaves, and any firm cartilage.
- Shred the oxtail meat using two forks.
Prepare the Consommé
- Strain the cooking liquid into a bowl or saucepan.
- Let it sit for several minutes so the red fat rises to the surface.
- Spoon several tablespoons of the red fat into a separate bowl for frying the tortillas.
- Keep the remaining broth warm to serve as consommé.
- Taste and adjust the salt if needed.
Assemble the Tacos
- Heat a cast-iron skillet or griddle over medium heat.
- Lightly coat each corn tortilla with the reserved red birria fat.
- Place the tortilla in the hot skillet.
- Add a small amount of Oaxaca cheese, if using.
- Top with shredded oxtail.
- Fold the tortilla in half.
Crisp the Tacos
- Cook for about 2 to 3 minutes, until the underside is crisp and golden-red.
- Flip and cook for another 1 to 2 minutes.
- Repeat with the remaining tortillas and filling.
Serve
- Serve the tacos immediately with warm consommé, diced white onion, chopped cilantro, and lime wedges.
Notes
- Cook the oxtail until it pulls easily from the bone; cooking time can vary between slow cookers.
- Do not burn the dried chiles while toasting or the birria may taste bitter.
- Use the red fat from the surface of the consommé to coat the tortillas instead of soaking them heavily in broth. This helps produce crispier tacos.
- Oaxaca cheese gives the best quesabirria-style melt. Monterey Jack or low-moisture mozzarella also works.
- For less spicy birria, leave out the chile de árbol.
- Make the birria one day ahead if possible. Chilling makes it easier to separate the rendered fat from the consommé.
- Reheat shredded oxtail with a few tablespoons of consommé so it stays juicy.
