Egg coffee, or ca phe trung, is a unique and popular drink in Hanoi. It is made by whisking egg yolks with condensed milk and coffee, resulting in a creamy and sweet beverage. The combination of the rich coffee flavor and the velvety texture of the egg mixture creates a delightful and indulgent drink. Egg coffee is typically served in small cups, and it is often enjoyed as a dessert or a mid-afternoon pick-me-up.