How to Brew Vietnamese Ultrafine Coffee Using a Drip Filter

If you’ve ever tried authentic Vietnamese coffee, you know the rich, bold intensity comes from finely ground beans brewed slowly over sweetened condensed milk. But getting that perfect balance at home—especially with ultrafine coffee powder—isn’t always straightforward. Here’s how to do it the traditional way using a simple metal drip filter.

To brew classic Vietnamese coffee with ultrafine grounds, use 30g of coffee, a metal drip filter (like a Vietnamese phin or ''), sweetened condensed milk, and sugar. The entire process takes around 10 minutes and results in a strong, sweet, and creamy cup. Adjust sweetness and milk to your taste, and serve hot or over ice.

What Is Vietnamese Ultrafine Coffee?

Vietnamese coffee traditionally uses a very finely ground roast—finer than espresso—to brew a strong, dark cup. This grind allows for a slower extraction through a small metal drip device, often paired with sweetened condensed milk to balance the intensity. The result is a thick, sweet, and robust coffee experience unique to Vietnam’s street-side coffee culture.

What You’ll Need for Brewing

To follow the standard Vietnamese method using ultrafine coffee, gather these essentials:

• 30g of ultrafine coffee grounds (finer than espresso)
• A metal drip filter (commonly called a or Vietnamese phin)
• Sweetened condensed milk
• Sugar (adjust to taste)
• Hot water (just off boil)
• A heatproof cup or glass (preferably pre-warmed)

Step-by-Step: Brewing Vietnamese Coffee with Ultrafine Grind

Follow these steps to brew a traditional Vietnamese cup using an ultrafine grind and a metal drip filter:

1. Preheat Your Equipment: Before brewing, pour hot water over both your cup and the metal drip filter to warm them up. This helps maintain brewing temperature.
2. Add Coffee to the Filter: Place 30g of ultrafine coffee grounds into the metal drip filter. Make sure the coffee bed is level, then attach and secure the filter top. Do not tamp—it’s not required for this method.
3. Brew Using Boiling Water: Slowly pour just-boiled water over the coffee grounds. The ultrafine grind will slow the dripping process significantly, allowing full extraction as the coffee slowly filters into your cup below.
4. Keep the Cup Warm: To avoid cooling during the 10-minute brew, place your receiving cup in a bowl of hot water or simply preheat it well. This helps maintain the right drinking temperature.
5. Add Condensed Milk and Sugar: Once brewing is complete, stir in sweetened condensed milk and sugar to your preference. Some drinkers also enjoy adding a few ice cubes for a chilled version.

The whole process, from heating to pouring, generally takes about 10 minutes—but the slow drip is essential for proper extraction with such a fine grind.

Why Use Ultrafine Grind for Vietnamese Coffee?

The ultrafine grind size mimics the extraction style of espresso but is used in a gravity-based drip system. This extremely fine particle size slows water flow dramatically, increasing contact time between water and coffee. That leads to a stronger, more intense extraction—ideal for balancing the sweetness of condensed milk and creating that signature bold Vietnamese cup.

Can You Make It Iced?

Yes. Once brewed, you can pour the finished Vietnamese coffee over ice for a refreshing cold version. Add ice cubes directly to the cup after brewing, or chill the brewed coffee before serving. The sweetness and milk help create a balanced iced drink.

Frequently Asked Questions

What is the ideal grind size for Vietnamese coffee?

The ideal grind size is ultrafine—finer than espresso. This grind is essential for the slow drip through a metal filter and contributes to a strong, fully extracted cup.

How much coffee should I use per brew?

The standard amount is 30g of ultrafine coffee grounds per brew. This yields a strong cup meant to be diluted or balanced with condensed milk and sugar.

Do I need to tamp the coffee in the filter?

No, you do not need to tamp the coffee when using a traditional Vietnamese metal drip filter. Simply level the grounds and brew.

Can I use regular espresso grind instead of ultrafine?

It’s better to use ultrafine coffee specifically for this method. A regular espresso grind may not slow the flow enough and could lead to under-extraction or a weak cup.

How long does the brewing process take?

The entire process, including heating and dripping, takes about 10 minutes. The dripping itself may take several minutes due to the ultrafine grind.

Is it necessary to preheat the cup and filter?

Yes, preheating both the cup and the metal drip filter helps maintain the optimal brewing temperature and prevents the coffee from cooling too quickly.

Recommended FrontStreet Beans for Vietnamese-Style Coffee

For a Vietnamese-style coffee experience at home, try FrontStreet Coffee’s Classic Blend or their Yirgacheffe single origin. The Classic Blend offers a balanced, medium-dark roast with chocolate and nut notes—perfect for pairing with condensed milk. For a fruitier twist, Yirgacheffe brings bright acidity with blueberry and floral tones that hold up well against sweet milk. Both work beautifully with the ultrafine grind and slow-drip method. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.