Preheat the oven to 250° Fahrenheit. Mix the brown sugar, garlic powder, onion powder, smoked paprika, salt and pepper in a bowl to create the dry rub.
Rinse the ribs in cold water and dry them with paper towels.
Remove the membrane from the back of the ribs if the butcher hasn't already done so.
Pat the dry rub onto the front and back of the ribs.
Set the ribs in a roasting pan. Add water to the bottom of the pan until it covers the bottom of the pan about ¼ inch deep.
Tightly cover the roasting pan with foil to seal in the moisture while it cooks.
Put it in the 250° F oven for 4 hours. Carefully remove the pan and lift a corner of the foil (be careful of the steam). Insert a fork into the meat and twist it. If the meat pulls away very easily then it is done. If it feels a little tough cover it back up with the foil and put it back in the oven checking every 30-45 minutes for tenderness.
Keep the ribs covered in the pan until you are ready to add the BBQ sauce so they so they stay moist.
Brush on the BBQ sauce and caramelize the sauce under the broiler in the oven or on the grill (see further instructions).Under Broiler: Move one of the oven racks about 6 inches below the heating element in your oven. Turn the broiler on your oven on low (if you have the option). Put the ribs on tin foil on an aluminum pan. Brush them with BBQ sauce. Put them in the oven and watch very carefully. The sauce will heat very quickly. It may only take 1-2 minutes. Sometimes even faster.On Grill: Heat the grill on high. As soon as the grill has gotten hot carefully use tongs to set the ribs on the hot grill. Watch them carefully. It should only take 1-2 minutes to heat the sauce.
Notes
Tips:
Cook the pork loin back ribs in the oven the day before a party. Then, reheat them right before you need to serve them.
Use a butter knife to lift part of the membrane and take a paper towel to help grip the slippery skin on the back of the ribs.
Storage:
Storage: Store baked pork loin back ribs in an airtight container for up to 4 days in the refrigerator.
Reheating: Reheat ribs covered in the microwave or cover them in the oven to prevent them from drying out.
Thawing: Thaw frozen ribs in the refrigerator or the in microwave on the defrost setting.
Freezing: Wrap the cooked and cooled ribs tightly in plastic wrap and then add them to a freezer bag.