Preheat the oven to 300°F (150°C).

In a small bowl, mix together the brown sugar, paprika, garlic powder, onion powder, black pepper, salt, and cayenne pepper to create the dry rub.

Rub the dry mixture all over the beef ribs, ensuring they are well coated.

Place the ribs in a roasting pan, bone side down, and pour the beef broth into the bottom of the pan.

Cover the pan tightly with aluminum foil and place it in the preheated oven.

Cook for 3 hours, or until the meat is tender and pulls away from the bone.

Remove the foil, baste the ribs with barbecue sauce, and return to the oven for an additional 30 minutes to caramelize the sauce.

Check the internal temperature; it should reach at least 190°F (88°C) for optimal tenderness.

Remove the ribs from the oven and let them rest for 10 minutes before slicing.

Serve with additional barbecue sauce on the side.