Egg coffee, or cà phê trứng, sounds unusual to a lot of first-time listeners, coffee with whipped egg yolk on top, but it has a genuinely charming origin story and a taste closer to a coffee-flavored custard than anything eggy or savory. It was invented in Hanoi in 1946 by a bartender named Nguyen Van Giang, who worked at the Metropole Hotel. During a serious fresh milk shortage that year, he whipped egg yolks with sugar and condensed milk into a light, airy foam as a stand-in for milk. He later opened his own shop, Giang Cafe, where the drink took on a life of its own and is still served today.
Traditionally, it is made with robusta coffee brewed through a phin, the small metal Vietnamese drip filter, but you can absolutely make a very good version at home with whatever strong coffee setup you have, a moka pot or concentrated drip coffee both work well as the base.
To make the egg cream topping, separate one egg yolk into a heatproof bowl and add about a tablespoon of sugar and a tablespoon of sweetened condensed milk. Whisk vigorously, by hand or with an electric mixer, for several minutes until the mixture turns pale, thick, and roughly doubles in volume. This step takes real effort by hand, an electric whisk will save your arm and get you there faster.
Some traditional versions gently warm this mixture over a double boiler while whisking, both to thicken it further and to lightly cook the yolk for food safety, which is worth doing if you are cautious about raw egg. Keep the heat low and keep whisking constantly so it does not scramble.
If you are wondering why the finished drink does not taste like scrambled eggs, the answer is mostly ratio and technique. A single yolk gets diluted across a full serving of sugar, condensed milk, and coffee, and vigorous whisking incorporates enough air that the texture reads as light and foamy rather than dense or custard-heavy. The sugar and condensed milk also mask the mild egg flavor almost completely, what actually comes through is closer to a light meringue or zabaglione than anything resembling breakfast eggs.
Brew your strong coffee separately and pour it into a small cup, filling it about half to two-thirds full. Spoon the whipped egg mixture generously on top, it should sit on the surface rather than sink in, similar to how a well-poured Guinness holds its head.
Drink it by stirring the egg foam into the coffee as you go, or take small sips through the topping the way it is traditionally served, letting the custardy sweetness mix into the coffee's bitterness gradually rather than all at once. It is meant to be a slow drink, not something to gulp down while rushing out the door.
While the classic version is served hot, in the cup the egg foam was whipped into, an iced version has become common too, especially useful in a tropical climate. Brew and cool your coffee first, or use a concentrated cold brew, pour it over ice, then top with the whipped egg mixture the same way. The texture holds up surprisingly well over ice, though it will not stay quite as airy as the hot version once it starts chilling and slightly deflating.
If you want to serve this to guests without whisking each cup individually to order, the egg mixture can be whipped in a larger batch ahead of time and portioned out per cup as needed, though it is best used within an hour or two of whipping since the foam will gradually lose volume the longer it sits, even refrigerated.
Since egg yolk is the star ingredient here rather than a supporting one, use the freshest, best-quality eggs you can reasonably get, the difference is much more noticeable than it would be baked into a cake or scrambled for breakfast. Room-temperature eggs also whip up faster and to a greater volume than cold eggs straight from the refrigerator, so pulling your egg out ahead of time is a small step that genuinely improves the final texture. Rice Life Foodie has a tempered-yolk version of this recipe worth reading if you want that food-safety step spelled out in more detail.
What started as a wartime substitute in one Hanoi cafe has since spread well beyond Vietnam, showing up on menus across Southeast Asia and increasingly in specialty cafes internationally as more people discover it. It is a good reminder that some of the most distinctive drinks in coffee culture came from genuine scarcity and improvisation rather than a deliberate attempt to invent something new, which is part of what makes trying it feel like tasting a small piece of real history rather than just another menu item.
If you want to try a version made by people who have clearly done this many more times than you have on your first attempt, Viet Cà Phê in Sto. Niño specializes in Vietnamese-style coffee and traditional dishes, and is a solid reference point for what the finished texture should look and taste like. Once you have this down, Vietnamese-style iced coffee is the natural next recipe to try, since it uses the same phin brewing logic in a completely different direction. Chao Coffee and Tea also demonstrates the whisking stage on video, which helps a lot if you are unsure what the finished foam is supposed to look like.