An agave-based old-fashioned with a wonderful hit of smokiness from the mezcal (depending on your choice of mezcal).
Like many cocktails, Philip Ward's...
I made it with orange bitters instead of aromatic. I had it with burritos for lunch and loved it, but it was a tad on the sweet side. Maybe it's due to the orange bitters, but I'll try with 5ml agave syrup next time.