This is from the bar at Palenque Mezcaleria in Denver. I believe the originator of this recipe is one Nathan Schmit.
This is Mezcal with Grappa. I never thought the strong earthy tones of mezcal can be ever matched or overpowered by anything. I was wrong. Try grappa. One caution – both are very strong. So, make sure you keep sucking orange slices with slightly sprinkled salt if you can.