Preheat oven to 300 degrees F. Line a baking sheet with parchment paper or aluminum foil. Place ribs on baking sheet.
Mix all spices together in a small bowl. Rub spices all over ribs. Cover with foil.
Bake for 2 hours, until ribs are very tender and nearly falling off the bone. Take them out of the oven and brush barbecue sauce all over ribs. Stick them back in the oven (this time without the aluminum foil) under the broiler for 5 minutes or until barbecue sauce starts to caramelize. Take them out of oven and coat with more barbecue sauce before serving.