Preheat your oven to 300°F (150°C) and line a baking sheet with heavy-duty aluminum foil.
Remove the thin membrane, or silverskin, from the back of the ribs by lifting it with a knife and pulling it off with a paper towel for a better grip.
In a small bowl, whisk together the smoked paprika, garlic powder, onion powder, sea salt, black pepper, and chili powder.
Rub the spice blend thoroughly into both sides of the ribs, pressing the seasoning into the meat.
Wrap the ribs tightly in a double layer of foil, ensuring the seam is on top to prevent juices from leaking, and place on the baking sheet.
Bake for 2.5 to 3 hours, or until the meat is tender and begins to pull away from the bone.
While the ribs cook, prepare the glaze by whisking tomato paste, apple cider vinegar, Dijon mustard, and maple syrup in a small saucepan over low heat for 5 minutes.
Carefully open the foil packet, drain any excess liquid, and brush the homemade BBQ glaze generously over the top of the ribs.
Switch the oven to broil and place the ribs back inside for 3-5 minutes until the glaze is bubbly and slightly caramelized.