CÀ PHÊ TRỨNG
Egg Coffee: The Strange Genius of Hanoi's Coffee Culture
Born from a 1940s milk shortage at a Hanoi café, egg coffee whips yolk, sugar and condensed milk into a custardy cloud atop strong robusta coffee.
See Hanoi street food tours on GetYourGuide ↗Invented out of scarcity, at Café Giảng
Egg coffee — cà phê trứng — was created in Hanoi around 1946 by a man named Nguyễn Văn Giảng, who reportedly worked as a bartender at the Sofitel Metropole hotel before opening his own small café. The story goes that fresh milk was scarce and expensive in wartime Hanoi, so Giảng improvised, whisking egg yolk with sugar into a foam to stand in for the milky coffees popular in the West. The result — closer to a warm custard sitting on top of strong coffee than a milky drink — became his café's signature. Café Giảng still operates in Hanoi today, run by his descendants, and is widely credited as the birthplace of the drink.
What's actually in the cup
A proper egg coffee is built in two layers: strong, hot Vietnamese coffee at the base, topped with a whipped mixture of egg yolk, sugar and usually a little condensed milk, beaten until it's thick, pale and airy — something between a meringue and a zabaglione. Some versions are baked or double-boiled to set the top slightly, giving a firmer, custard-like texture rather than a loose foam. You drink it slowly, mixing the layers a little at a time with a spoon rather than stirring it all together at once, so you get both the bitterness of the coffee underneath and the sweet, rich egg cream on top in every sip.
Why milk was the missing ingredient
Egg coffee's invention makes more sense once you know Vietnam's dairy history: fresh milk wasn't a large part of the traditional diet and was genuinely hard to source reliably in 1940s Hanoi, particularly during the disruptions of the era. Condensed milk, imported and shelf-stable, had already become the standard way Vietnamese coffee was sweetened and enriched further south and in Saigon-style iced coffee. In the north, and in Hanoi specifically, egg yolk offered a workaround that used a locally available, protein-rich ingredient to create a similarly rich, creamy result without relying on imported fresh milk — turning a shortage into what's now one of the city's most distinctive foods.
Robusta, not arabica, is the base
Underneath the egg sits coffee brewed from robusta beans, the variety that dominates Vietnamese coffee growing — the country is one of the world's largest coffee producers and overwhelmingly a robusta producer, with most of it grown in the Central Highlands. Robusta has roughly double the caffeine of arabica and a heavier, more bitter, less acidic flavour, which is exactly why it holds its own against the sugar and egg piled on top — a delicate arabica would simply disappear. French colonists introduced coffee cultivation to Vietnam in the 19th century, and the robusta-heavy, strong-and-sweet style that developed since has become the country's own thing rather than an imitation of French coffee culture.
The phin filter, and how it's brewed
Vietnamese coffee, egg coffee included, typically starts in a phin — a small metal filter that sits directly on top of the cup or glass, with a perforated base and a press disc that sits over the grounds. Hot water is poured in and the coffee drips through slowly, by gravity alone, taking several minutes rather than the seconds of an espresso shot. It's a deliberately unhurried method, meant to be watched while you wait, and it produces a strong, concentrated coffee well suited to being mixed with sugar, condensed milk, ice or — in Hanoi's case — a full spoonful of whipped egg. Cafés across the Old Quarter still brew this way rather than using espresso machines.
Finding it today, hot or iced
Egg coffee has since spread well beyond Café Giảng, and most Old Quarter cafés now serve their own version, often up narrow staircases in buildings that look more like homes than shops — part of the fun is simply finding the room. It typically comes two ways: cà phê trứng nóng, served warm with the egg foam still soft, or cà phê trứng đá, a cooler variation. Either way, expect something closer to dessert than a to-go coffee, meant to be lingered over rather than downed quickly. It's commonly the sweet, rich finishing note on a Hanoi food evening — a fitting last stop after a night of savoury street food.
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