Lay the baby back ribs on baking sheets. Set aside.
Stir together the salt, paprika, onion powder, garlic powder, cumin and pepper in a small bowl.
Spread this dry rub onto both sides of the ribs. Set aside.
Add the water, vinegar, ketchup, Worcestershire sauce, and maple extract into the crock pot and stir until combined.
In a small bowl stir together the salt, cocoa powder and stevia.
Whisk this into the crock pot then add the ribs on top of the sauce.
Cover and cook on low 10-12 hours or until meat is falling off the bones. During the last 2 hours of cooking coat the ribs with some of the sauce.
Coat the ribs with the rest of the barbecue sauce before serving.