The espresso tonic sounds wrong on paper. Coffee and tonic water? But the combination works because of chemistry: the bitterness of tonic enhances the fruity and floral notes of espresso rather than clashing with them, producing a drink that's refreshing, complex, and surprisingly light for something coffee-based.
The Recipe
Method
- Fill a glass with ice — more than you think you need.
- Pour cold tonic water over the ice first. This chills the tonic and sets the base.
- Brew espresso (or a concentrated AeroPress shot — 15g coffee, 60ml water, fine grind).
- Pour the hot espresso slowly over the back of a spoon held just above the tonic surface. This creates a layered effect as the espresso floats briefly before combining.
- Don't stir. Let it combine naturally as you drink it.
Which Beans Work Best
Ethiopian light roasts — particularly naturals or washed coffees from Yirgacheffe — are spectacular in an espresso tonic. Their blueberry, citrus, and floral notes amplify beautifully against the tonic's bitterness. Avoid dark roasts — the roasty, chocolate notes clash with tonic rather than harmonising.
No Espresso Machine?
A concentrated AeroPress shot (15g coffee, 60ml water at 90°C, 1 minute steep, fine-medium grind) works very well as a substitute. The result is a slightly different flavour profile but equally refreshing.