The Endless Night is a modern cocktail that was created by author Jassy Davis and was first published in her book Winter Warmers: 60 Cosy Cocktails for Autumn & Winter. Based on the Black Russian, it calls for the classic’s combination of spirit and coffee liqueur but substitutes the vodka for molasses-rich dark rum and tops it all with aromatic bitters and soda.
Fill a lowball or short highball glass with cracked ice.
Add rum, coffee liqueur, and bitters to lowball or short highball glass.
Using a bar spoon, gently stir for 3-5 seconds.
Top with soda.