Ingredient
Coffee
Strong, hot and ideally fresh — for Irish coffee, espresso martinis, cafe fertig and the small grown-up end of the winter cocktail world.
Flavour profile
Coffee in a cocktail is best treated like a spirit: get good stuff and use it properly. For Irish coffee a strong filter or French press is right; for an espresso martini you really do need espresso. Instant coffee belongs nowhere near a drink you charge for. Always serve immediately — coffee oxidises in the glass and a cold-tasting hot drink is the saddest version of the whole category.