Prepare the Sauce: Whisk all the sauce ingredients in a medium bowl until the mixture is smooth and uniform. Set this aside to let the flavors meld while you prep the meat.
Season the Ribs: Trim your spare ribs and remove the silver skin from the back. Apply a generous coating of the SPG rub to both sides of each rack.
Fire Up the Egg: Set your Big Green Egg for indirect cooking using the convEGGtor and a drip pan filled with water.
Stabilize your temperature at 250°F and add one large chunk of Hickory for a clean smoke profile.
The First Smoke: Place both racks of ribs on the grid. Let them smoke undisturbed for 3 hours to build a solid bark and absorb that hickory flavor.
The Wrap (3-1-1 Method): Remove the ribs from the Egg. Lay out two large sheets of heavy-duty aluminum foil. Place each rack meat side down on its own sheet. Add 4 pats of butter and 1/4 cup of beer to each foil packet. Seal them tightly and return them to the Egg for 1 hour at 250°F
The Glaze: Carefully remove the ribs from the foil and place them back on the cooking grid. Brush a thick layer of the Gochujang sauce over the top and sides of both racks.
The Final Set: Increase the Egg temperature to 300°F. Cook the ribs for 1 final hour. This higher heat is what caramelizes the sugars in the glaze and creates that signature sticky texture.
Test and Serve: Use the toothpick test to ensure the meat is tender. Once the ribs have a beautiful mahogany crust and the meat has pulled back from the bones, remove them from the grill. Let them rest for 10 minutes before slicing.