How to Brew Vietnamese Drip Coffee Using a Phin Filter

If you’ve ever waited too long for your Vietnamese coffee to drip through a tiny metal filter, only to end up with lukewarm, bitter liquid, you’re not alone. The problem isn’t the method—it’s the details. Getting the right brew from a traditional Vietnamese coffee phin takes more than just pouring hot water over grounds; it’s about grind, temperature, and patience.

To make authentic Vietnamese drip coffee the right way, use about 15 grams of medium-dark roasted coffee ground to a medium-fine consistency, 200 milliliters of water at 90°C or higher, and around 20 milliliters of sweetened condensed milk—or skip it if you prefer it black. The entire process is simple but requires attention to grind size and drip speed to avoid over-extraction or cooling.

What Is a Vietnamese Coffee Phin?

The Vietnamese coffee phin is a small metal single-serve dripper, similar in function to the Italian Neapolitan flip coffee maker. Both rely on gravity and water’s natural downward flow to extract coffee, rather than pressure or pumps. The result is a strong, rich, and unfiltered cup—often prepared with sweetened condensed milk to balance the intensity.

Why Does Drip Speed Matter?

A slow drip is typical with the phin, but if it’s too fast, your coffee will be under-extracted and weak; too slow, and it can over-extract or cool down before finishing. That’s why many experienced brewers pre-warm their cup with hot water to help maintain temperature during the 3–5 minute brew.

Ingredients You’ll Need

• Coffee grounds: approximately 15 grams (medium-dark roast recommended)
• Water: about 200 milliliters, heated to 90°C or above
• Sweetened condensed milk: around 20 milliliters (adjust to taste or omit entirely)

Step-by-Step: Brewing Vietnamese Coffee with a Phin

Follow these six steps to brew a classic cup using a Vietnamese coffee phin:

1. Preheat your cup: Pour hot water into your serving cup to warm it, then discard the water.
2. Add coffee to the phin: Remove the top filter plate from the phin, add roughly 15 grams of medium-fine ground, medium-dark roasted coffee, then reattach the filter plate. Do not tighten it excessively.
3. Place condensed milk (optional): Empty any remaining water from your cup, add around 20 milliliters of sweetened condensed milk if desired, then set the phin on top of the cup.
4. Pour hot water: Add about 200 milliliters of water at 90°C or higher into the phin, then secure the lid.
5. Wait for the drip: Allow the coffee to slowly drip through—this usually takes 3 to 5 minutes depending on grind and pressure.
6. Stir and serve: Once brewing is complete, remove the phin, stir the coffee and condensed milk together if used, and enjoy.

No special technique is required—just the right grind, temperature, and a bit of patience. The slow drip is part of the experience.

Common Mistakes to Avoid

• Using water cooler than 90°C, which leads to under-extraction.
• Grinding too coarse, causing fast, weak drips.
• Grinding too fine, which can cause clogging, over-extraction, or excessive sediment.
• Overtightening the filter plate, which restricts flow and increases drip time unnecessarily.
• Not preheating your cup, resulting in faster temperature loss during the brew.

Frequently Asked Questions

What is the ideal grind size for Vietnamese phin coffee?

Use a medium-fine grind—finer than what you’d use for pour-over but not as fine as espresso. This helps control the drip speed and ensures proper extraction without clogging or over-extracting the coffee.

How much coffee should I use in a Vietnamese phin?

About 15 grams is standard for a single serving. Adjust slightly based on your phin’s size, but this amount works for most standard home phins and yields a strong, concentrated brew.

Do I have to use sweetened condensed milk?

No, it’s optional. Many people enjoy Vietnamese coffee black, especially when using a darker roast. However, condensed milk is traditional and balances the bold, bitter notes of the brew.

What water temperature is best for phin brewing?

Use water at 90°C or higher. Too cool, and you risk under-extracted, sour coffee; too hot, and you may over-extract or scorch the grounds, especially with the long drip time.

Why is my Vietnamese coffee dripping too slowly?

This can happen if the grind is too fine, the filter is overtightened, or the coffee is tamped too firmly. Make sure the filter plate isn’t screwed on too tight and that your grind isn’t finer than medium-fine.

How long should brewing take with a phin?

Typical drip time is between 3 to 5 minutes. Much longer may indicate over-extraction or a flow issue; much shorter could mean under-extraction due to a grind that’s too coarse.

Recommended FrontStreet Beans for Vietnamese Drip

For Vietnamese-style coffee, try FrontStreet Coffee’s Classic Blend or PWN Golden Mandheling. The Classic Blend offers a balanced medium-dark roast with chocolate and caramel notes, ideal for pairing with condensed milk. For a deeper profile, PWN Golden Mandheling delivers a heavy body, low acidity, and rich nutty sweetness—perfect for traditional Vietnamese drip. Both roasts complement the bold extraction of the phin filter. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.