Preheat oven to 300°F.
In a small bowl, combine the smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Pat the baby back ribs dry with a paper towel and rub the spice mixture evenly over both sides.
Wrap the seasoned ribs tightly in parchment paper, then wrap again in aluminum foil to seal in the moisture.
Place the foil-wrapped ribs on a baking sheet and roast in the oven for 2 hours until the meat is tender and pulling away from the bone.
While the ribs roast, whisk together the tomato paste, apple cider vinegar, dijon mustard, maple syrup, and liquid smoke in a small saucepan over low heat for 5 minutes.
Carefully unwrap the ribs, discard the foil and parchment, and brush the top of the ribs generously with the prepared BBQ glaze.
Set the oven to broil and place the glazed ribs back inside for 3 to 5 minutes until the glaze is bubbly and slightly charred.