Smoked Picanha Birria Tacos

Begin by prepping the 3 lb picanha (sirloin cap). Using a sharp knife, score the thick fat cap in a 1-inch crosshatch pattern, cutting just through the fat to the meat's surface but not into the muscle. This increases the surface area for salt penetration and allows the fat to render effectively during the initial smoke. Combine 2 tbsp coarse salt and 1 tbsp black pepper, then season the entire roast aggressively on all sides. The coarse salt is essential for creating the osmotic pressure needed to draw moisture out and then pull the seasoning deep into the fibers.

Preheat your smoker to 250°F using oak pellets for a robust, traditional flavor profile. Place the picanha directly on the grates fat-cap-up. This orientation allows the rendering fat to baste the meat as it heats. Smoke the beef until it reaches an internal temperature of 165°F. This typically takes 120 to 150 minutes. At this stage, you are looking for a mahogany-colored bark and ensuring the meat passes through the 40-140°F danger zone efficiently to prevent bacterial growth while absorbing maximum nitric oxide for a smoke ring.

While the beef smokes, heat a dry skillet over medium-high heat. Toast 4 dried guajillo chiles and 3 dried árbol chiles for 30 seconds per side until fragrant but not burnt. Transfer to a bowl and cover with 1 cup of boiling water for 20 minutes. The guajillo provides color and earthiness, while the árbol provides heat. Softening the skins is mandatory for a smooth consommé; unhydrated skins will leave a gritty, 'plastic' texture in the final dipping broth.

In a blender, combine the softened chiles and their soaking liquid with 6 cloves garlic, 1 chopped white onion, 2 halved roma tomatoes, 2 cups beef broth, 1 tsp cumin, 1 tsp oregano, and 0.5 tsp cinnamon. Blend on high until completely liquefied. Crucially, pass this mixture through a fine-mesh strainer into a bowl, discarding the pulp. This ensures the 'consommé' is a true sipping broth rather than a thick sauce, allowing the beef fat to separate cleanly later for frying.

Once the picanha hits 165°F, transfer it to a large Dutch oven. Pour the strained consommé over the meat until it reaches halfway up the sides. Cover tightly with a lid or double foil. Maintaining a tight seal is vital to create a high-humidity environment that breaks down the collagen in the sirloin cap. Return the pot to the smoker or an oven. The liquid will now begin to braise the meat, softening the fibers that the dry smoke would otherwise toughen.

Continue cooking until the internal temperature reaches 203°F-205°F. At this point, use a meat probe to check for 'probe tenderness'—it should feel like pushing a needle through room-temperature butter. The fat cap should be completely translucent and gelatinous. This temperature range is the sweet spot where the muscle fibers separate easily but haven't yet turned to mush. Ensure the internal temp stays above 140°F during the entire transition to ensure food safety.

Remove the Dutch oven from the heat but keep it covered for 20 minutes. This rest allows the muscle fibers to reabsorb some of the seasoned consommé, preventing the beef from drying out the moment you shred it. Once rested, lift the beef out. Use a spoon to skim the red oil (seasoned beef fat) off the top of the liquid and reserve it in a small bowl. This fat is necessary for the Maillard reaction on the griddle to produce the 'quesabirria' crust.

Shred the beef and season with more salt if needed. Dip a corn tortilla into the reserved red fat, then place it on a medium-high griddle. Add Oaxacan cheese and the shredded picanha. Fold and fry for 2 minutes per side until the shell is crispy and stained deep orange. Serve with ramekins of the hot, strained consommé topped with fresh cilantro and diced onion. The tacos must be served immediately to maintain the contrast between the crispy shell and the succulent, braised meat.