If you haven’t used the 3-2-1 method to get smoked spare ribs to that coveted “fall off the bone” tenderness and juiciness then you haven’t had ribs at their best.
Leave the ribs sitting until the rub gets a “wet” look showing that it has absorbed moisture from the mustard and the meat juices.
The ribs are now ready for the smoker.
Set up your smoker for cooking at about 225-240 °F using indirect heat and cherry wood for smoke.
Once the smoker is ready, place the ribs directly on the smoker grate and cook for 3 hours.
At the end of 3 hours, wrap the spare ribs with 2 layers of heavy duty foil to allow the ribs to steam and tenderize.
At the end of 2 hours wrapped in foil, unwrap them once again and place them back into the smoker at 225-240°F to firm up the crust and finish cooking.
You can also place them on a 300°F grill for about 5 minutes each side. This is a great time to brush on sauce if you like.