The phin

A filter, not a machine

A phin is the small metal filter that Vietnamese coffee is brewed in. It sits on top of the cup. Ground coffee goes in, hot water goes over, and the coffee drips through on its own. No pump, no pressure, no machine.

The slowness is the point. The coffee falls a drop at a time, so the cup comes out dense and rich rather than thin. In Vietnam the phin sits on the table in front of you while you talk. The drink is ready when it is ready.

Why robusta

There are two main coffee beans, arabica and robusta, and Vietnam grows more robusta than anywhere else on earth. Robusta is the hardier of the two, with about twice the caffeine and a darker taste: cocoa, toast, a bitter edge. It is not the lesser bean. It is a different one, and the phin was made for it.

Why condensed milk

Fresh milk was hard to keep in the tropics, so tinned sweetened condensed milk became the habit. Its thick sweetness happens to sit perfectly against a strong, bitter coffee, which is why the pairing outlived the fridge. Cà phê sữa đá, iced coffee with condensed milk, is that pairing on ice. It is the drink most people mean when they say Vietnamese coffee.

How we brew it

We use a medium-fine grind and water just off the boil. A splash first to wet the grounds, then fill and wait. A good phin drips at about a drop a second and takes four to five minutes. Too fast and the cup is weak; too slow and it turns harsh. The numbers alongside are a reliable start at home.

Three ways to drink it

Cà phê đen is black coffee, hot or over ice, for people who want the bean and nothing else. Cà phê sữa đá adds condensed milk and ice: sweet, strong, the classic. Bạc xỉu is the gentle one, mostly milk with a small pour of coffee, and the easiest first step in.