Drink preparation — Vietnam
Vietnamese egg coffee (cà phê trứng)
Egg yolk beaten with condensed milk into a thick sweet foam and floated on hot phin coffee — a Hanoi invention that answered a milk shortage and stayed.
- Country
- Vietnam
- Where
- Hanoi, where it originated and where it remains most strongly associated.
- Brewing mechanism
- Metal gravity filtration
- Heat technique
- Water poured from elsewhere, Stovetop, Residual or added heat
- Filtration
- Perforated metal plate
- Grounds in the cup
- No
- Grind
- As for phin coffee — medium-coarse.
- Serving size
- 100-180 ml
- Preparation time
- 8-12 minutes
Local names
- Vietnamese
- cà phê trứngca phe trungkah-FAY chung
What it is
Egg coffee is a phin brew with a meringue-like cap. Egg yolks are whisked hard with sweetened condensed milk, and sometimes over gentle heat, until they thicken into a pale, glossy, custard-textured foam. That foam is spooned over hot black coffee, where it sits as a distinct layer; the glass is usually set in a bowl of hot water to keep it warm while it is drunk slowly through the cap.
The origin is unusually well attested for a drink of this kind: it is credited to Nguyễn Văn Giang in Hanoi in the 1940s, when fresh milk was scarce and beaten egg yolk served as a substitute. The café he founded still trades on the drink. That does not make every claim about it verified — the precise date and the details of the original recipe vary between tellings — but the attribution itself is consistent across sources.
It tastes far less strange than it sounds. There is no egg white and no cooked-egg flavour; what reaches the drinker is a sweet, thick, tiramisu-adjacent cream over strong bitter coffee.
What makes it distinct: Egg yolk used as an emulsifier and foaming agent in place of dairy cream — a technique borrowed from pastry rather than from coffee.
Cultural context
A Hanoi speciality that has become a national and then an international signature drink. It is a sit-down drink rather than a street one — it needs to be drunk where it is made, before the foam and the coffee lose their separation.
Vessel and equipment
Brewed in a phin; the foam is made separately in a bowl with a whisk.
Brewed in
How it is made
Water passes down through a grounds bed held by perforated metal.
The coffee is a standard unheated phin drip. Heat is applied instead to the egg mixture in some methods, and to the water bath the finished glass sits in.
- Brew strong black coffee in a phin directly into a small heatproof glass. (about 5 minutes)
- Separate egg yolks — whites are not used — and whisk them hard with sweetened condensed milk until pale, thick and glossy. Some methods whisk over a bain-marie. (about 3 minutes)
- Spoon the foam over the hot coffee so it sits as a distinct layer.
- Serve the glass standing in a bowl of hot water, so it stays warm while it is drunk slowly.
- Sugar
- Sweetness comes from the condensed milk whisked into the yolk.
- Milk
- Sweetened condensed milk, as the base of the foam rather than added to the coffee.
- Additions
- Egg yolk; Cocoa powder as a garnish in some cafés
- Foam
- The whole drink is the foam. Yolk lecithin and protein stabilise an air-and-sugar structure that sits on the coffee without immediately dissolving into it.
How it is served
A small glass standing in a bowl of hot water, drunk slowly through the foam.
Served with: Iced tea
When: Afternoon and evening more than morning; it is a sitting-down drink.
Taste
Tendencies of the preparation, not a prediction about any particular cup.
- Body
- High
- Clarity
- Low
- Sediment in the cup
- Low
- Perceived strength
- Medium-high
- Bitterness tendency
- Medium
- Acidity tendency
- Low
- Sweetness tendency
- High
What the method does
The foam physically separates the drinker from the coffee for the first few mouthfuls, so the sequence of the drink is sweet-then-bitter rather than blended. As it collapses the two combine and the drink changes character partway through — which is a genuine feature of how it is served, not a fault.
What the tradition does
Dark robusta underneath, heavily sweetened dairy above. The comparison people reach for is tiramisu, and it is a fair one.
What the method does not control
The coffee has to be strong and bitter enough to survive that much sugar and fat; a delicate light-roast arabica disappears under it.
- Texture
- Custard over liquid, then progressively one thing.
- Aroma
- Sweet dairy and cocoa; the coffee reads more on the palate than the nose.
- Aftertaste
- Sweet and custard-like, coating the mouth well after the coffee beneath it has gone.
Caffeine
The coffee underneath is an ordinary phin serving, so the caffeine is a phin serving's — the egg adds none. Perceived strength drops sharply because of the sugar and fat, which is a good example of why perceived strength is a poor guide to caffeine.
CoffeeHQ states no milligram figure for this preparation, because no measurement specific to it has been established. Inventing one would be easy and wrong.
What moves the number
- The phin dose beneath
- Robusta content
How it differs from
- Vietnamese phin coffee
- Same coffee base. There the condensed milk is stirred through and the drink is iced and homogeneous; here it is whipped with egg yolk into a stable layer and served hot, so the drink is stratified and changes as it is drunk.
In practice
Common mistakes
- Using whole egg rather than yolk only, which brings a cooked-white texture and smell
- Under-whisking, so the foam sinks
- Letting the coffee go cold before the foam goes on
Household and regional variation
Whether the yolk mixture is whisked cold or over heat, and whether cocoa, butter or cheese is added, varies by café.
Modern adaptations
Iced versions, cocoa-dusted versions and egg-foam variants on other drinks are common in Hanoi cafés.
Misconceptions
- That it tastes of egg. Correctly made it does not.
- That it is an ancient tradition. It is a documented twentieth-century invention, which makes it no less real.
Related preparations
Elsewhere on CoffeeHQ
History, culture and background
Related in the catalogue
Evidence
What CoffeeHQ could not establish
- The 1946 date and the details of the original recipe are consistently attributed but not independently verified by CoffeeHQ.
- Whether the yolk mixture was originally cooked is unclear.
Sources
- Atlas Obscura and Gastro Obscura food and drink documentation — Atlas Obscura
- Sprudge coffee industry journalism — Sprudge Media Network
- Perfect Daily Grind industry journalism — Perfect Daily Grind