01 - Preheat the oven to 300°F.
02 - Rub the beef chuck roast with salt, pepper, smoked paprika, brown sugar, garlic powder, and onion powder.
03 - Heat olive oil in a large Dutch oven over medium-high heat. Sear the beef on all sides until browned, about 2-3 minutes per side.
04 - Pour in the beef broth and BBQ sauce. Cover and transfer to the preheated oven. Braise for 3-3.5 hours, or until the beef is very tender and can be easily shredded.
05 - While the beef cooks, prepare the coleslaw. In a large bowl, combine green cabbage, red cabbage, carrots, and red onion. In a separate bowl, whisk together mayonnaise, apple cider vinegar, Dijon mustard, sugar, salt, and pepper. Pour the dressing over the vegetables and toss to combine. Refrigerate until ready to serve.
06 - Once the beef is cooked, remove from the oven and shred using two forks. Mix with its cooking juices and additional BBQ sauce if desired.
07 - Slice the brioche slider buns and lightly toast if preferred.
08 - Pile pulled beef onto the bottom half of each bun. Top with a generous spoonful of coleslaw, and drizzle with more BBQ sauce if desired. Replace the bun tops and serve immediately.