01 -
Pat the beef shank and short ribs dry with paper towels. Season generously on all sides with salt and black pepper and arrange in a large oven-safe baking dish or Dutch oven.
02 -
Stem, seed, and devein the ancho and guajillo chiles. Press them flat in a dry skillet over medium heat for about 15 seconds per side until fragrant and slightly darkened. Stop before any smoke appears. Burnt chiles will make the adobo bitter. Transfer to a bowl and cover with very hot water. Soak for 20 minutes until fully soft.
03 -
Char the tomatoes, onion, and garlic directly over a gas burner or under a broiler until lightly blackened in spots, about 5 to 8 minutes. This adds smokiness to the adobo.
04 -
Toast the cloves, cumin seeds, and black peppercorns in a dry pan for 20 to 30 seconds until fragrant. Add them to a blender with the drained chiles, roasted vegetables, Mexican oregano, marjoram, cinnamon stick, and white vinegar. Puree until completely smooth, adding a splash of water only if the blender needs it. Taste and season with salt.
05 -
Pour the adobo over the beef, turning each piece to coat all sides. Cover tightly with aluminum foil and refrigerate for at least 4 hours, preferably overnight.
06 -
Preheat the oven to 350°F (175°C). Keep the baking dish covered tightly with foil and braise for 3.5 to 4 hours until the meat pulls apart easily with two forks. Check at the 3-hour mark and add a splash of water if the bottom of the dish looks dry.
07 -
Transfer the meat to a cutting board and shred it, discarding any large bones. Skim the fat from the surface of the cooking liquid and save it for frying if you like. Taste the consomé and adjust the salt. Strain through a fine sieve for a cleaner broth.
08 -
Heat a comal or skillet over medium-high heat. Briefly dip a corn tortilla into warm consomé to coat both sides, then lay it on the hot surface. Add a small handful of shredded cheese and a generous scoop of shredded beef to one half. Fold, press gently, and cook for 2 to 3 minutes per side until golden and crunchy.
09 -
Ladle warm consomé into small cups. Serve the tacos immediately with diced white onion, fresh cilantro, and lime wedges. Dip each bite into the consomé.