The name of this cocktail translates to 'Fluffy Cascara', and is a reference to both the texture of the drink, as well as the combination of Mr Black and Maraschino liqueur.
Using a dark rum as the base was an easy choice. The dried fruit and soft spices pair perfectly with the Arabica coffee in Mr Black. Locked down recently in Auckland, I found an online copy of Harry Johnson's Bartenders Manual from 1882, and have been drinking Golden Era cocktails for weeks.
Add all the ingredients to a shaker and fill with ice.
Shake vigorously for 15 seconds.
Double strain into a chilled coupe.
Garnish with freshly grated nutmeg.