3Marinate the ribs in a dish with the juice of two oranges and a quarter cup of apple cider vinegar for 30 minutes.
4Make the BBQ rub by mixing together a quarter cup of brown sugar, two tablespoons of smoked paprika, one tablespoon of onion powder, one tablespoon of garlic powder, one teaspoon of ground mustard, half a teaspoon of cayenne pepper, half a teaspoon of chili flakes, half a tablespoon of salt, and half a tablespoon of black pepper.
5Place the ribs on a baking tray lined with aluminum foil, sprinkle with the BBQ rub and pat it into the meat.
6Bake the ribs in the oven at 275°F for about three hours.
7Make the blackberry BBQ sauce by simmering twelve ounces of blackberries with half a cup of water.
8Mash the blackberries and strain the juice.
9Mix one cup of ketchup, a third of a cup of apple cider vinegar, two tablespoons of honey, one tablespoon of Worcestershire sauce, one tablespoon of hot sauce, half a tablespoon of molasses, two tablespoons of BBQ rub, and a quarter cup of brown sugar in a saucepan.
10Add the blackberry juice to the saucepan.
11Add two tablespoons of liquid smoke (optional).
12Once the ribs are cooked, brush the BBQ sauce over them.