01 - Preheat oven to 300°F.
02 - Pat the brisket dry and season evenly with smoked paprika, chili powder, cumin, salt, and black pepper.
03 - Heat olive oil in a large Dutch oven over medium-high heat. Sear brisket on all sides until deeply browned, approximately 8 minutes.
04 - Remove brisket and set aside. Add onion and garlic to the pot, sautéing for 2–3 minutes until softened and fragrant.
05 - Return brisket to the pot. Pour in beef broth and barbecue sauce. Cover tightly with lid.
06 - Transfer to oven and cook for 4 hours, or until meat is fork-tender and easily shreds.
07 - In a large bowl, combine green and red cabbage, grated carrot, mayonnaise, apple cider vinegar, Dijon mustard, sugar, salt, and pepper. Mix thoroughly. Refrigerate until ready to serve.
08 - Transfer cooked brisket to cutting board. Shred meat using two forks, tossing with some cooking juices. Add additional barbecue sauce if desired.
09 - Layer shredded brisket on bottom half of each slider bun. Top with coleslaw and pickle slices. Close with bun tops.
10 - Serve immediately with extra barbecue sauce on the side for drizzling.