Place the lamb shoulder on the smoker and smoke for 3 hours. Insert an prompt learn Bluetooth thermometer, like the Thermoworks Smoke Unit, to watch the internal temperature. In this section the smoked lamb will begin to turn pink and develop a bark. Hi Silvia — unsure if you will notice this, but there are plenty of similarities between this recipe and J. Kenji’s carne asada recipe on SeriousEats. He had a similar question of the way to obtain a deeper flavor in the marinade.