Egg coffee (ca phe trung) is a sweet and dense Vietnamese beverage that traditionally consists of strong black robusta coffee that is mixed with egg yolks and sweetened condensed milk. The egg yolks and the milk are whipped for about 10 minutes, and boiled until meringue-like consistency.
The coffee is mostly made using a traditional Vietnamese phin filter in which the coffee is brewed and then slowly dripped in a cup. It is poared into the whipped eggs, forming the characteristic, aromatic foam. The origin of the drink dates back to 1950s and the French Indochina War.