Preheat your oven to 275°F (135°C).
Remove the membrane from the back of the ribs. This tough layer can prevent flavors from penetrating and make the ribs chewy.
In a small bowl, mix together the smoked paprika, garlic powder, onion powder, cayenne pepper, salt, and black pepper to create your dry rub.
Generously apply the dry rub to both sides of the ribs, massaging it into the meat.
Wrap the ribs tightly in aluminum foil and place them on a baking sheet.
Bake the ribs for 2.5 to 3 hours, or until the meat is tender and starting to pull away from the bones.
While the ribs are cooking, prepare the Apple Butter BBQ sauce. In a saucepan, combine the apple butter, BBQ sauce, apple cider vinegar, and Worcestershire sauce.
Simmer the sauce over medium-low heat for about 15 minutes, stirring occasionally, until it thickens slightly.
Once the ribs are tender, remove them from the oven and increase the temperature to 400°F (200°C).
Carefully open the foil packets (watch out for steam!) and brush the ribs generously with the Apple Butter BBQ sauce.
Return the ribs to the oven, uncovered, and bake for an additional 10-15 minutes, or until the sauce is caramelized and slightly charred in spots.
Remove from the oven, let rest for 5-10 minutes, then cut into portions and serve with extra sauce on the side.