Hanoi egg coffee (cà phê trứng), whipped to a custard cap
10 min · 2 small cups
A photo like it (an egg coffee) · David McKelvey (CC BY 2.0) via Wikimedia Commons · source
Invented in Hanoi in 1946, when fresh milk was scarce, by the family whose café is still on the chart: strong drip coffee under a warm, whipped yolk-and-condensed-milk cream that tastes like liquid tiramisu.
2 very fresh egg yolks (pasteurised if you prefer)
3 tbsp sweetened condensed milk
1 tsp sugar (optional)
120 ml (1/2 cup) very strong coffee: dark Vietnamese robusta from a phin, or 2 espresso shots
Hot water and 2 small bowls for a warm water bath
How to make it
Brew (5 min): Make the coffee in a phin (see the phin recipe) or pull two shots. Divide between 2 small heatproof cups and stand them in a bowl of hot water to keep warm.
Whip (3 to 4 min): In a clean bowl, whisk the yolks, condensed milk and sugar with a hand mixer on high (or a whisk and patience) until pale, thick and doubled, like soft-whipped cream; when you lift the beaters it should fall in a slow ribbon.
Top (30 sec): Spoon the egg cream gently over the coffee in each cup, about 2 cm (1 in) deep. It floats.
Serve (at once): Dust with a little cocoa or ground coffee if you like and serve in its warm water bath with a small spoon. Eat the cream from the top first, then stir the rest in.
Tips
Fresher eggs whip higher. Use them at room temperature.
Iced version: whip the cream the same way and float it over coffee poured on ice.
Too sweet? Cut the condensed milk to 2 tbsp and add a pinch of salt.