Smoky mezcal is a wonderful pairing for elderflower and ginger liqueurs in this frothy egg-enriched cocktail.
'domaine de canton' on Serious Eats
The King's Ginger may have only reappeared on bar shelves last year, but it technically has been in production since the early 1900s, when it was supposedly prescribed as a warming medicinal tonic for King Edward VII. It's a bit more subtly gingery than Domaine de Canton, but it also seems more natural tasting (and less sweet.)
This variation adds a splash of ginger liqueur to the mix along with a sweet rim of ground gingersnap cookies.