Directions

• Cut pork belly into 1 1/2-inch pieces. Toss together pork pieces and oil in a large bowl. Whisk together salt, chile powder, black pepper, onion powder, garlic powder, cayenne, and 1/4 cup of the brown sugar in a small bowl; sprinkle over pork, and rub into pork to coat. Arrange pork pieces, fat cap up, in a single layer on a wire rack that will fit inside your smoker or grill.
• Prepare smoker according to manufacturer's instructions, bringing internal temperature to 250°F to 300°F; maintain temperature 15 to 20 minutes (if using a gas or charcoal grill, set up the grill for low indirect heat). Smoke pork on a wire rack, maintaining temperature inside smoker between 250°F and 300°F, until meat is almost tender, about 2 hours, 30 minutes.
• While meat is smoking, prepare the Barbecue Sauce: Stir together ketchup, brown sugar, vinegar, Worcestershire, chile powder, salt, onion powder, garlic powder, and cayenne in a medium microwavable bowl until well combined. Microwave on HIGH until sauce bubbles and sugar is dissolved, 60 to 90 seconds. Set aside until ready to use.
• Transfer pork to a 13-by-9-inch disposable aluminum pan; add 1/2 cup barbecue sauce and remaining 3 tablespoons brown sugar, and toss to coat. Reserve remaining barbecue sauce for serving. Cover pan tightly with aluminum foil, and return to smoker; continue to cook at 250°F to 300°F until meat is tender, 30 minutes to 1 hour.
• Remove foil cover from pan, and toss together pork and juices in pan. Continue smoking, uncovered, at 250°F to 300°F until meat is very tender and glaze starts to caramelize, 30 minutes to 1 hour more.
• Serve pork belly burnt ends with remaining barbecue sauce, sliced white bread, pickles, sliced white onion, and pickled jalapeños.