Preheat your smoker or charcoal BBQ to 125-150°C. Line a baking sheet with foil or parchment paper and place the beef ribs onto it.
Remove the membrane from the back of the ribs to allow the seasoning to penetrate the meat.
Rub the olive oil or mustard all over the ribs to act as a binding agent. Generously season each side of the ribs with the Big Dog Spices Smokey Espresso rub, ensuring to coat as evenly as possible.
Place the ribs in the smoker (add some wood chunks of your choice - we like oak or hickory) or BBQ for about 8 hours until they have a nice (smoke) colour.
Remove the ribs from the smoker/bbq when the meat reaches an internal temperature of 95-100°C (or when you probe the meat and it feels soft like butter).
Let the ribs rest briefly before serving. You can serve your ribs as is or with your favourite side dishes. They go great with mashed potatoes, roasted vegetables, or even macaroni and cheese.