01 - Set the oven temperature to 300°F.
02 - Combine kosher salt, black pepper, smoked paprika, garlic powder, onion powder, dried thyme, and cayenne pepper in a small bowl.
03 - Pat beef short ribs dry and coat thoroughly with the dry rub, pressing gently to adhere the spices.
04 - Place ribs bone side down in a large roasting pan and pour beef broth into the base.
05 - Cover pan tightly with foil and bake for 2 hours and 30 minutes until ribs are tender.
06 - Mix barbecue sauce, apple cider vinegar, honey or brown sugar, and Worcestershire sauce in a bowl.
07 - Remove ribs from oven, discard foil, and brush ribs generously with barbecue glaze.
08 - Increase oven temperature to 425°F or set broiler to high. Return ribs uncovered to oven and cook 15 to 20 minutes, basting with additional glaze halfway through, until sticky and caramelized.
09 - Let ribs rest for 10 minutes before slicing and serving.