The History and Culture of Vietnamese Coffee

## Origins Coffee was introduced to Vietnam by French colonists in the 19th century. The country quickly became one of the world's largest coffee exporters, known primarily for its robusta beans. The global coffee trade can be visualized as: ```mermaid graph TD A[Vietnam] -->|Robusta 97%| B(World Market) C[Brazil] -->|Arabica| B D[Colombia] -->|Arabica| B B --> E[Europe 40%] B --> F[USA 25%] B --> G[Asia 35%] ``` ## Traditional Brewing Vietnamese coffee is traditionally brewed using a **phin** — a small metal drip filter placed over a cup. The physics of drip brewing follows a simple relationship: $$ Q = \frac{\Delta P \cdot \pi r^4}{8 \eta L} $$ Where $Q$ is flow rate, $\Delta P$ is pressure difference, $r$ is filter radius, $\eta$ is viscosity, and $L$ is bed depth. ### Egg Coffee (Cà Phê Trứng) Invented in Hanoi in 1946, egg coffee is made with egg yolks, condensed milk, and sugar, whipped into a creamy froth poured over strong black coffee. ## Coffee Culture - **Cà Phê Sữa Đá** — Iced coffee with condensed milk, the most popular style - **Cà Phê Đen Đá** — Iced black coffee, no milk - **Bạc Xỉu** — Coffee with mostly milk (favorite in Saigon) A typical day in the life of Vietnamese coffee: ```mermaid sequenceDiagram participant Morning participant Phin participant Me Morning->>Phin: Add grounds + hot water Phin-->>Phin: 5 min drip Phin->>Me: Pure black coffee Me->>Me: Add condensed milk Note over Me: Cà Phê Sữa Nóng ``` > "Coffee is not just a drink in Vietnam — it is a daily ritual, a social event, and a way of life." Vietnam is now the second-largest coffee exporter in the world, after Brazil. The growth rate over recent years: | Year | Export (tons) | Growth | |------|--------------|--------| | 2020 | 1,565,000 | — | | 2021 | 1,785,000 | +14% | | 2022 | 1,920,000 | +7.6% | | 2023 | 2,100,000 | +9.4% |