Ingredients
| Ingredient | Amount | Notes |
|---|---|---|
| Vietnamese Robusta coffee, ground medium-coarse | 20-25g, about 3 tablespoons | Dark-roast Robusta is the most commonly cited choice for this drink |
| Hot water, just off the boil | 80-120ml, around 93-96°C/200-205°F | Named cà phê đen recipes reviewed for this page range from about 1:4 to 1:8.6 |
| Sugar | To taste, optional | Vietnamese ordering convention treats black as no milk, not necessarily unsweetened |
| Ice | As needed, for the iced version | Only used for cà phê đen đá, not the hot version |
Step-by-step method
Step 1: Rinse the phin
Rinse the phin filter and your serving cup or glass with a little hot water, then discard the rinse water. This warms the equipment and helps maintain a more stable brewing temperature.
Step 2: Add the coffee
Add the ground coffee to the phin chamber. Shake it gently from side to side to level the bed of grounds evenly across the bottom.
Step 3: Set the press
Place the internal press according to your specific phin's design, whether it is a loose gravity insert or a screw-down type. Avoid pressing down hard, since compacting the grounds too tightly can slow or block the drip.
Step 4: Bloom the coffee
Pour a small splash of hot water over the grounds, just enough to saturate them evenly. Wait 30 to 40 seconds for the coffee to bloom, releasing trapped gas before the main pour.
Step 5: Add the remaining water
Fill the phin chamber with the remaining hot water and put the lid on. This is the main portion of the brew that will extract most of the coffee's flavor.
Step 6: Let it drip
Let the coffee drip slowly and steadily into the cup below. This typically takes 4 to 7 minutes depending on grind size, dose, and press fit. Wait until it stops dripping completely.
Step 7: Serve hot
For cà phê đen nóng, remove the phin, stir in sugar if you want it sweetened, and serve immediately while still hot. Drink it plain if you want the most direct robusta flavor.
Step 8: Serve iced
For cà phê đen đá, stir in sugar if using, then pour the finished coffee over a glass filled with ice. Stir again briefly to help it chill and dilute slightly before drinking.
Getting the ratio right
Coffee-to-water ratios for cà phê đen vary noticeably across the recipe sources reviewed for this page. One named recipe uses about 20g of coffee to 80ml of water, a strong ratio of roughly 1:4. Another uses about 14g of coffee to 120ml of water, a much more diluted ratio of roughly 1:8.6.
Given that spread, the ingredient table above uses a practical starting dose of 20-25g of coffee to 80-120ml of water. From there, use a bit less water for a stronger cup, or a bit more water if the result tastes too intense or bitter.
Hot versus iced: what actually changes
The core brewing method for cà phê đen nóng and cà phê đen đá is identical; the only difference is what happens after the coffee finishes dripping. The hot version is served as-is, often with sugar stirred in. The iced version is poured over ice immediately after brewing.
Because the iced version dilutes on contact with ice, some recipes brew slightly stronger or use a bit less water when preparing coffee specifically for cà phê đen đá. This is a matter of preference rather than a strict rule.
How this compares to other Vietnamese coffee drinks
Cà phê đen is the plainest member of Vietnam's coffee family: strong Robusta and water, with no milk and only optional sugar. Vietnamese iced coffee with milk, cà phê sữa đá, uses the same brewing method but adds sweetened condensed milk to the glass before the coffee is poured in.
If you prefer a sweeter, creamier drink, see the Vietnamese Iced Coffee (Cà Phê Sữa Đá) Recipe. Cà phê đen is the better starting point for tasting Robusta's flavor on its own, without milk softening it.