Instructions
Make coffee (original recipe used espresso but strong coffee from a French press/cafetiere is fine). Mix all ingredients in cocktail shaker and serve in cocktail glass. No garnish.
Notes
I am yet to try a little chocolate powder or cinnamon in the mixture.
Alternatively, as it has a nice crema, put the chocolate or cinnamon on top.
I found that a little but of salt improved this cocktail remarkably. I used unsweetened cold brew. It could be that some more dilution from icing freshly made espresso or hot coffee would have resulted in a similar improvement to the balance.