Mix the seasoning

• Combine the brown sugar, paprika, garlic powder, onion powder, salt and pepper in a small bowl.

Season the roast

• Place the chuck roast in the slow cooker and rub it all over with the yellow mustard.
• Coat both sides of the roast with the seasoning mixture.

Add the liquid and butter

• Pour the beef broth and liquid smoke around the roast so the seasoning isn't washed off.
• Top the roast with the sliced butter.

Slow cook the beef

• Cover and cook on LOW until the beef is fork tender.

Shred the beef

• Remove the roast and shred it, discarding any large pieces of fat.
• Drain the cooking liquid and return the shredded beef to the slow cooker.

Finish with BBQ sauce

• Mix the BBQ sauce into the shredded beef.
• Cook on HIGH, stirring occasionally.

Assemble the sliders

• Pile the BBQ beef onto the Hawaiian sweet rolls and serve.