A guest asks for a cortado. Another wants a flat white, "not a latte, a proper flat white". A third asks for an oat milk cappuccino and a fourth wants iced coffee. If you cannot build each of these correctly and consistently, the service falls apart, because the difference between these drinks is not mysterious — it is ratio, volume and foam.
The Espresso Family
| Drink | Build | Typical volume |
|---|---|---|
| Espresso | Single or double shot, ~1:2 ratio | 30-60 ml |
| Ristretto | Same dose, restricted yield (~1:1) — sweeter, denser | ~20-30 ml |
| Lungo | Same dose, longer yield (~1:3+) — bigger, more bitter | ~60-90 ml |
| Macchiato | Espresso "marked" with a spoon of foam | ~40-60 ml |
| Cortado | Espresso + equal part steamed milk, minimal foam | ~90-120 ml |
| Flat white | Double (often ristretto) + steamed milk, thin microfoam | ~150-180 ml |
| Cappuccino | Espresso + steamed milk + a distinct foam cap | ~150-180 ml |
| Latte | Espresso + more steamed milk, thin foam | ~200-300 ml |
| Mocha | Espresso + chocolate + steamed milk | ~250 ml |
| Americano | Espresso + hot water | ~120-180 ml |
| Long black | Hot water first, espresso poured on top (crema preserved) | ~120-150 ml |
| Affogato | Shot poured over vanilla ice cream, served immediately | Dessert |
| Iced latte | Espresso + cold milk over ice | ~300 ml |
| Cold brew | Coarse grounds steeped in cold water 12-24 h, then filtered | Served over ice |
Cold brew is not iced coffee: it is a separate brew, low in acidity and smooth, and it must be started a day ahead. Plan it into the day's prep.
Plant Milks
They are not milk and do not behave like milk. Protein is what builds foam, and most plant milks are low in it.
| Milk | Foaming | Taste with espresso | Watch for |
|---|---|---|---|
| Oat (barista edition) | Very good; creamy microfoam | Sweet, neutral, best all-rounder | Standard (non-barista) oat foams poorly |
| Soy | Good; higher protein | Beany; can be sweet | Curdles with hot, acidic espresso |
| Almond | Poor to fair; thin, bubbly | Nutty; can taste thin | Splits easily; nut allergen |
| Coconut | Fair | Distinctive; overwhelms delicate coffee | Separates |
- Choose barista editions: they have added protein, fat and stabilisers precisely so they texture.
- To reduce splitting: steam the plant milk to a lower temperature (around 55-60 C), and pour the milk into the espresso rather than the espresso into cold plant milk.
- Steam plant milks slightly less hot and use them fast; they collapse quicker than dairy.
Consistency Is the Product
- Use the same cups, the same dose and the same jug every time.
- Write the house builds on a card and make every crew member follow it. A guest who gets a different flat white each morning notices.
Onboard Notes
- Allergens are serious. Almond and other nut milks are a genuine anaphylaxis risk. Store, label and jug them separately, and never assume "plant milk" means safe for a nut allergy.
- Wash and rinse jugs between dairy and plant milk. Cross-contamination is both an allergy and a religious/dietary issue.
- Record preferences on the guest preference sheet: their milk, their cup, their strength. Getting it right unasked on day two is the whole job.