Prepare the rib rub mixture. In a bowl, combine the brown sugar, smoked paprika, kosher salt, black pepper, chili powder, garlic powder, onion powder, and cayenne pepper. Mix everything together until well combined. This blend of spices will give your ribs that perfect balance of sweet, smoky, and spicy flavors.
Prep the ribs. Before applying the rib rub, make sure to dry ribs, and remove the thin membrane on the back of the ribs. Use a paper towel to pat them dry and remove any excess moisture. This will help the rib rub adhere better to the meat.
Apply the dry rib rub. Generously sprinkle the bbq rub mixture all over your baby backs or spare ribs, making sure to coat both sides generously. Use your hands to gently rub the mixture into the meat, allowing the flavors to penetrate. Be sure to cover every nook and cranny for maximum flavor.
Let the flavors marry. Once you’ve applied the rib rub, it’s time to let the flavors develop. Place the seasoned ribs in a sealed container or wrap them tightly in plastic wrap. Refrigerate for at least 4 hours, but for best results, let them marinate overnight. This will allow the sweet, smoky, and spicy flavors to infuse the meat!