How to Brew Vietnamese Drip Coffee Using a Phin Filter

If you’ve ever watched someone make Vietnamese coffee, you’ve likely wondered how such a small device—just a little metal cup with a filter—can produce such rich, heavy-bodied coffee. The secret isn’t fancy equipment or complex technique, but a slow, natural drip extraction that builds intensity drop by drop. But getting it right takes more than just pouring hot water over grounds. Here’s exactly how to do it, step by step, using the traditional Vietnamese coffee setup most people know as a ‘phin’ or ‘drip filter.’

To brew classic Vietnamese drip coffee, use around 15g of medium-dark roasted coffee ground to a medium-fine setting, 200ml of water at 90°C or higher, and optionally 20ml of sweetened condensed milk. Total brew time is slow—often several minutes—but that’s essential for proper extraction.

What Is a Vietnamese Coffee Drip Filter?

The Vietnamese coffee dripper—commonly called a phin—is a small metal single-serve brewer that works much like an Italian Neapolitan flip coffee pot. It uses gravity and water saturation to extract coffee slowly through a filter. There’s no pressure involved, and the design is simple: a chamber for coffee grounds, a perforated filter plate, and a lid. The result is thick, bold coffee, usually served sweetened with condensed milk.

Why Does Vietnamese Coffee Taste So Strong and Sweet?

Vietnamese drip coffee is known for being intense and often sweet. That’s partly due to the roast level—medium to dark—and partly because it’s traditionally brewed directly onto sweetened condensed milk. The slow drip also gives the water more contact time with the grounds, extracting deeper flavours. If you skip the milk, the coffee remains very concentrated, with a heavier mouthfeel than most filter methods.

Ingredients and Tools You’ll Need

• Coffee grounds: ~15g (medium-dark roast recommended)
• Grind size: medium-fine (not too coarse or too fine)
• Water: ~200ml, 90°C or higher
• Sweetened condensed milk: ~20ml (adjust to taste or omit)
• Vietnamese coffee phin filter (drip brewer)
• Coffee cup or heatproof glass

Step-by-Step: How to Brew Vietnamese Drip Coffee

1. Preheat your cup by pouring hot water into it, then discard the water.
2. Remove the top filter plate from the phin. Add 15g of medium-dark, medium-fine ground coffee into the bottom chamber.
3. Place the filter plate back on top of the grounds. Do not tighten it too much—just enough to create a seal, allowing slow, even dripping.
4. Empty out the preheating water from your cup. Add around 20ml of sweetened condensed milk if desired, then place the phin filter directly on top of the cup.
5. Pour approximately 200ml of water at 90°C or higher into the phin’s chamber. Ensure all the coffee grounds are saturated, but don’t overflow. Secure the lid.
6. Let the coffee drip slowly. This can take several minutes depending on grind size and tightness of the filter. Do not press down on the filter.
7. Once brewing is complete, remove the phin. Stir the coffee and condensed milk together if used, then enjoy.

Common Mistakes to Avoid

Using water that’s too cool (below 90°C) will under-extract the coffee, resulting in flat flavour. A grind that’s too coarse will cause the coffee to drip too fast, producing weak, thin results. Conversely, a grind that’s too fine can clog the filter, leading to over-extraction, bitterness, or no flow at all. Don’t tamp the coffee too hard; the phin relies on gentle pressure, not force. And be patient—the slow drip is part of what develops its signature richness.

Why Slow Dripping Makes a Difference

The long brew time of Vietnamese drip coffee—sometimes 3 to 5 minutes or more—isn’t a flaw, it’s a feature. That slow descent of water through the grounds allows for fuller extraction of body, sweetness, and aroma. It also means your coffee may cool slightly during the process. For best results, some coffee enthusiasts pre-warm their cups in hot water, as mentioned in the original instructions, to help maintain temperature.

Frequently Asked Questions

How much coffee do I use in a Vietnamese phin filter?

Use around 15g of medium-dark roasted coffee. This is the standard dose for a single serving in most standard-sized phin filters.

What grind size is best for Vietnamese drip coffee?

Grind to a medium-fine consistency—finer than pour-over but not as fine as espresso. Too coarse and it will drip too quickly; too fine and it may clog the filter.

Do I have to use condensed milk in Vietnamese coffee?

No, condensed milk is optional. Many people enjoy the strong, bitter brew black, but traditionally, around 20ml of sweetened condensed milk is added for a sweet, creamy drink.

What water temperature should I use for Vietnamese drip coffee?

Use water at 90°C or higher. Water that’s too cool will result in under-extracted, weak-tasting coffee.

Why is my Vietnamese phin filter dripping too fast or too slow?

Dripping speed depends on grind size and how tightly the filter is screwed on. Adjust the grind to be finer for slower dripping, or loosen the filter plate slightly if it’s clogged. Don’t tamp the coffee.

How long does Vietnamese drip coffee take to brew?

Brew time can range from 3 to 5 minutes or longer, depending on the grind size, coffee dose, and how tightly the filter is set. Slow is normal and desired.

Recommended FrontStreet Coffee for Vietnamese Drip

For traditional Vietnamese drip coffee, try FrontStreet Coffee’s Classic Blend or Black Cocoa Blend. The Classic Blend offers a balanced medium-dark roast with notes of dark chocolate and caramel—ideal for the bold, sweet profile Vietnamese coffee is known for. The Black Cocoa Blend leans slightly darker with deeper cocoa and roasted nut flavours, complementing condensed milk perfectly. Both roasts work well with a medium-fine grind and highlight the full-bodied extraction phin brewing is known for. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.