☕ Three key facts
- Cà phê trứng was created in 1946 by Nguyễn Văn Giảng at the Sofitel Metropole in Hanoi (Vietnam), during a wartime milk shortage caused by the First Indochina War.
- The drink combines a thick foam of beaten egg yolk and sweetened condensed milk with a strong Vietnamese robusta coffee brewed slowly through a phin filter (3 to 5 minutes).
- Vietnam is the world's second-largest coffee producer (approximately 1.8 million tonnes per year, around 95% robusta), which underpins the entire flavour identity of this drink.
Vietnamese Egg Coffee (Cà Phê Trứng): Complete Guide
Cà phê trứng (Vietnamese egg coffee) is a drink that began as an act of improvisation. In 1946, a bartender at the Sofitel Metropole in Hanoi (Vietnam) named Nguyễn Văn Giảng found himself without fresh milk, a wartime shortage. Rather than abandon the café au lait his guests expected, he reached for what was available: egg yolks and a tin of sweetened condensed milk. Beaten together until thick and foamy, the mixture became a topping unlike anything else in the coffee world. Placed over a small cup of strong robusta, the result was a drink that tasted of custard and dark roast, sweetness and bitterness, in one small vessel.
The Giảng Family: From the Metropole to Café Giang
Nguyễn Văn Giảng created the recipe while employed as a bartender at the Sofitel Metropole (Hanoi, Vietnam), one of the city's most prestigious hotels, built during the French colonial period in 1901. After leaving the hotel, he opened his own establishment: Café Giang (Giang Coffee), located at 39 Nguyễn Hữu Huân in the Hoàn Kiếm district of Hanoi. The café became closely identified with the drink he had invented.
The Giảng family's stewardship of the recipe has been notably conservative. His son, Nguyễn Văn Dậu, continues to run Café Giang today, using the original formula without significant alteration. Visitors from across the world travel to Hoàn Kiếm specifically to taste the drink in the place where the Giảng family has served it for decades. The café is small, unassuming, and usually crowded. The drink arrives in a tiny cup, resting in a bowl of hot water to stay warm.
The Phin Filter: Slow, Concentrated, Essential
Central to the character of cà phê trứng is the method by which the coffee base is brewed. The phin is a small stainless steel filter, typically cylindrical, that balances on the rim of a cup. Ground coffee is placed inside, a perforated press disc is set on top, and hot water is poured over it. The liquid drips through by gravity over 3 to 5 minutes, producing a brew that is more concentrated than most filter methods yet less pressurised than espresso.
The phin is not simply a practical tool: it produces a specific flavour profile. The slow extraction draws out the heavier, more syrupy compounds in robusta coffee while minimising the extraction of volatile acidic fractions. The result is dense, slightly bitter, with a lingering roasted finish. This intensity is not incidental: without it, the sweetness of the egg foam would overwhelm the cup entirely. The two elements are calibrated against each other.
Ingredients and Step-by-Step Recipe
The following quantities produce one serving of traditional cà phê trứng.
Ingredients: 2 egg yolks, 2 tablespoons (approximately 30 g) of sweetened condensed milk (Longevity Brand / Ông Thọ or Eagle Brand recommended), 8 to 10 g of dark-roasted Vietnamese robusta, 30 ml of hot water for the phin.
- Prepare the phin coffee. Place the phin filter on a heatproof cup. Add 8 to 10 g of ground robusta (medium grind). Set the press disc on top without compressing too hard. Pour approximately 5 ml of water at 92 to 95 °C over the grounds and wait 30 seconds for the bloom. Add the remaining water to reach 30 ml total. Allow the coffee to drip through over 3 to 5 minutes.
- Prepare the egg foam. Place 2 egg yolks in a small deep bowl. Add 2 tablespoons of sweetened condensed milk. Beat with a hand mixer or stand mixer at medium speed for approximately 5 minutes until the mixture is pale, thick, and forms a stable ribbon when the beater is lifted. The foam should hold its shape without collapsing.
- Assemble. Pour the 30 ml of hot brewed coffee into the cup. Using a spoon, gently deposit the egg foam on top of the coffee in a single thick layer.
- Keep warm. Set the cup inside a small bowl of hot water, as is traditional at Café Giang, to maintain temperature throughout drinking.
- Serve. The drink is consumed by sipping through the foam without stirring, allowing both layers to combine in the mouth, or by mixing the foam into the coffee with a small spoon for a more uniform result.
Flavour Profile: Custard, Bitterness, and Contrast
The flavour of cà phê trứng is built on opposition. The egg foam is sweet, creamy, and rich with the faint savoury note of cooked yolk. The condensed milk contributes a pronounced sweetness and a slightly caramelised dairy character. Beneath it, the robusta base provides bitterness, dark roast, and the earthy, almost rubbery undertones characteristic of dark-roasted Vietnamese robusta. Together, the combination functions less like a blended drink than like a two-part tasting experience: the opening registers as a dessert, the finish as a strong coffee.
Comparisons to tiramisu are common and partially apt: the mascarpone-and-espresso structure of that dessert shares something with the egg foam-and-robusta structure here. Zabaione, the Italian whipped egg yolk preparation, is an even closer parallel. What distinguishes cà phê trứng is the deliberate separation of the layers: the contrast is preserved throughout drinking, not resolved at the outset.
Vietnam's Coffee Industry: Context for Robusta
The choice of robusta in cà phê trứng is not arbitrary: it reflects the agricultural reality of Vietnam's coffee industry. Vietnam is the world's second-largest coffee producer after Brazil, with an annual output of approximately 1.8 million tonnes, of which around 95% is robusta (Coffea canephora). The main growing regions are concentrated on the Central Highlands, particularly around Buôn Ma Thuột in Dak Lak province.
The principal cultivated variety is Catimor, a hybrid selected for its resistance to leaf rust and high yield. The Culi variety (a peaberry mutation, where the cherry produces a single rounded bean instead of two flat-sided halves) is prized for its higher concentration of flavour compounds. A small production of arabica-type Moka is grown near Da Lat, in the Lam Dong province, where cooler altitudes permit its cultivation. This Moka variety occasionally appears as a premium substitute for robusta in contemporary egg coffee preparations.
Modern Variants and Adaptations
| Version | Change from original | Flavour result |
|---|---|---|
| Traditional (Café Giang) | Egg yolk, Ông Thọ condensed milk, dark robusta, phin | Sweet custard foam, intense bitter base |
| Iced egg coffee | Same foam, coffee base served over ice | Cooler, slightly less stable foam |
| Vegan | Coconut condensed milk instead of dairy | Coconut notes, slightly lighter body |
| Salted | Pinch of salt added to the foam | Salt enhances egg aroma, reduces sweetness perception |
| Specialty coffee base | Arabica single origin (e.g. Da Lat Moka) replaces robusta | More floral and acidic, less bitter contrast |
The vegan version substitutes coconut condensed milk for the standard dairy product, producing a foam with a recognisable tropical note. The salted variant applies a culinary principle: a small amount of salt suppresses sweetness and amplifies other aromatic compounds, particularly the sulphurous notes of egg yolk. Specialty coffee bars in Hanoi (Vietnam) have experimented with arabica bases, but practitioners generally note that the reduction in bitterness weakens the defining contrast of the drink.
Making Cà Phê Trứng at Home
Reproducing cà phê trứng at home requires minimal equipment. A phin filter is available online or in Asian grocery shops for under 10 euros or dollars. Sweetened condensed milk in the Ông Thọ or Eagle Brand formulation can be found in most Asian supermarkets. Vietnamese dark-roasted robusta is widely available through specialty importers and online retailers.
The critical technique is the foam. The egg yolks must reach ribbon stage: when the beater is lifted, the mixture should fall back into the bowl in a thick, continuous ribbon that holds for several seconds before disappearing. Under-beaten foam will disperse immediately into the coffee; over-beaten foam may turn grainy. Five minutes at medium speed with an electric mixer is the reliable benchmark. A pinch of salt or a drop of vanilla extract can be added to the foam without altering the core character of the drink.
Frequently Asked Questions
Who invented Vietnamese egg coffee (cà phê trứng)?
Cà phê trứng was invented in 1946 by Nguyễn Văn Giảng, a bartender at the Sofitel Metropole in Hanoi (Vietnam). During the First Indochina War, fresh milk became scarce. He replaced it with a beaten egg yolk and sweetened condensed milk foam. He later opened Café Giang (Giang Coffee) at 39 Nguyễn Hữu Huân, Hoàn Kiếm district, Hanoi. His son Nguyễn Văn Dậu continues the tradition today.
What is a phin filter and how does it work?
A phin is a small cylindrical stainless steel filter that sits directly on top of a cup. Hot water is poured over coarsely ground robusta coffee, and the liquid drips through slowly over 3 to 5 minutes by gravity. The result is a concentrated, strong coffee with a slightly syrupy texture, intense enough to balance the sweetness of the egg foam topping.
Can Vietnamese egg coffee be made at home without a phin filter?
Yes. In the absence of a phin filter, a strong moka pot brew or a concentrated pour-over can substitute as the coffee base, provided the result is sufficiently concentrated. A phin filter can be purchased online for under 10 euros or dollars. For the foam, an electric hand mixer makes the process faster: beat 2 egg yolks with 2 tablespoons of sweetened condensed milk for approximately 5 minutes until a thick, pale, ribbon-stage foam forms.
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