Setup your Big Green Egg for indirect cooking using the ConvEGGtor or EGGspander base with (2) half moon ceramic inserts. Preheat to 300°F using 3-4 smoking wood chunks e.g., Apple Wood or Hickory
Trim your spare ribs and remove the membrane
Slather the ribs with yellow mustard and cover with the BBQ rub
When the Big Green Egg is at temperature and the smoke is light gray in color, place the ribs inside
Let them smoke for 1.5 hours spritzing with a mix of 1/2 cup apple juice and 1/2 cup cider vinegar
At the 1.5 hour mark make sure the bark is set and looks good then remove ribs and place them meat side down in to an aluminum foil sheet lined with pats of butter, brown sugar and honey
Place butter, brown sugar, and honey on the rib side then pur 1/2 cup of apple juice in the bottom of the foil packet
Seal the ribs and place them back in the Big Green Egg meat side down for another 1-hour
After the hour wrapped, remove the ribs from the foil packet and glaze with the BBQ sauce
Place the ribs back in to the Big Green Egg and let cook for another 30 minutes allowing the sauce to set
Remove the ribs and let them rest 10-15 minutes before slicing and serving