Clean and trim the ribs to a St. Louis cut removing the membrane on the bone side
Mix the rub ingredients together
Apply yellow mustard to the racks of spare ribs then season both racks with the rub mixture
Setup your Big Green Egg for indirect cooking with 3 chunks of wood
Preheat the Big Green Egg to 350°
When the temp is stable and smoke clean put ribs inside
Let smoke for the first hour undisturbed
Mix your spritz ingredients together and place in spray bottle
After that mop or spray the ribs every 30 minutes until done
At the 3 hour mark check to see if the ribs pass the bend test and you see the bones sticking out
Once done pull the ribs, rest 20 minutes, slice, and serve