How to Brew Vietnamese Drip Coffee Using a Phin Filter

Making traditional Vietnamese coffee at home often leads to one big question: why is my brew weak, bitter, or just takes forever? The issue usually comes down to grind size, water temperature, or using the wrong drip technique. With the right setup, you can brew a bold, smooth cup reminiscent of street-side cafés in Hanoi—no fancy machine required.

To brew authentic Vietnamese coffee using a phin filter, use about 15g of medium-dark roasted coffee, grind it medium-fine, pour 200ml of water at 90°C over it, and let it drip slowly. Add around 20ml of sweetened condensed milk if desired. The entire process takes patience—but the result is rich and full-bodied.

What Is a Vietnamese Drip Coffee Filter?

The Vietnamese coffee filter, often called a phin, works similarly to an Italian Napoletana flip pot. It relies on gravity and natural water penetration to extract coffee. Unlike espresso machines or pour-over brewers, it doesn’t use pressure or complex pouring techniques. The result is a thick, intense brew—but the trade-off is a slow drip rate that can cool the coffee as it drips. For best results, preheat your cup with hot water to maintain temperature during brewing.

Why Use Medium-Dark Roast Coffee?

Vietnamese-style coffee traditionally uses a medium to dark roast. This roast level brings out heavier body, lower acidity, and notes of chocolate and caramel—ideal for balancing the sweetness of condensed milk. Lighter roasts may taste too bright or acidic in this style. FrontStreet Coffee’s Classic Blend, designed for moka pots and espresso, includes robusta beans like Vietnam’s own Robusta variety, offering bold flavors that suit this preparation well.

Key Ingredients & Equipment

To brew properly, you’ll need:

• Coffee: 15g of medium-dark roast coffee (around 5–8 on the roast spectrum)
• Grind Size: Medium-fine (not as fine as espresso, but finer than standard drip)
• Water: Approximately 200ml at 90°C or higher
• Sweetener (optional): Around 20ml of sweetened condensed milk (adjust to taste or skip entirely)
• Equipment: Vietnamese phin filter, coffee cup or heatproof glass

Step-by-Step: How to Brew Vietnamese Coffee with a Phin

Here’s the exact method used to achieve a proper Vietnamese drip:

1. Preheat your cup: Pour hot water into your cup to warm it, then discard the water.
2. Load the coffee: Remove the top filter plate from the phin, add 15g of medium-dark, medium-fine ground coffee into the bottom chamber.
3. Secure the filter: Place the top filter plate back on top of the coffee grounds. Do not tighten it too much—the goal is even pressure, not a seal.
4. Add condensed milk (optional): Pour out any remaining water in the cup, then add around 20ml of sweetened condensed milk if using.
5. Brew the coffee: Set the phin filter on top of the cup, pour in about 200ml of water at 90°C, and cover with the lid.
6. Wait for the drip: Let the coffee drip slowly through the filter. Do not press or stir. This can take several minutes.
7. Stir & serve: Once all the coffee has dripped through, stir to mix the concentrated coffee with the condensed milk. Serve hot.

What Affects the Drip Speed?

Several factors influence how fast (or slow) the coffee drips through the phin:

• Grind size: Too coarse and the water flows too quickly, leading to under-extracted coffee. Too fine and it clogs, slowing the drip or creating bitter, over-extracted flavors. Medium-fine is ideal.
• Water temperature: Water that’s too cool (below 90°C) results in flat, underdeveloped extraction. Too hot (above 96°C) can scorch the grounds and cause bitterness.
• Filter tightness: Over-tightening the top plate restricts flow and may lead to uneven extraction or overflow.
• Coffee freshness: Stale coffee can reduce aroma and clarity, affecting both taste and drip performance.

Frequently Asked Questions

Can I make Vietnamese coffee without condensed milk?

Yes. While condensed milk is traditional, you can brew the coffee black or with sugar, milk, or plant-based alternatives. Omitting the milk will result in a stronger, more bitter profile typical of pure Vietnamese drip coffee.

What’s the best grind size for a Vietnamese phin filter?

The optimal grind size is medium-fine—finer than standard drip coffee but not as fine as espresso. It should feel similar to table salt. This allows proper extraction without clogging the filter or causing overly slow dripping.

Why is my Vietnamese coffee dripping too slowly?

Slow dripping is usually caused by coffee grounds that are too fine, overly compacted coffee, or a phin filter that’s tightened too much. Check your grind size and ensure the filter isn’t sealed too tightly.

How hot should the water be for Vietnamese drip coffee?

Use water at 90°C or higher. Ideal brewing temperature is around 90–96°C. Water that’s too cool leads to under-extraction and weak flavor, while water that’s too hot can over-extract and cause bitterness.

Can I use an espresso roast in a phin filter?

You can, but it’s not ideal. Espresso roasts are typically very dark and oily, which may clog the filter or produce harsh flavors. A medium to dark roast with balanced body and mild acidity works better for Vietnamese drip.

Do I need to stir the coffee after brewing?

Yes, especially if you’ve added condensed milk. Stirring ensures the concentrated brewed coffee mixes evenly with the milk, giving you a uniform flavor in every sip.

Recommended FrontStreet Beans for Vietnamese Drip

For Vietnamese-style coffee, try FrontStreet Coffee’s Classic Blend, crafted for moka pots and espresso machines. It combines Brazilian, Indonesian, and Vietnamese beans—including robusta—for a wild, spicy edge with creamy, nutty undertones. The rich crema and full body pair perfectly with condensed milk. Alternatively, Black Cocoa Blend offers balance with dark chocolate and caramel notes, ideal if you prefer less intensity. Both roasts deliver the bold foundation needed for traditional Vietnamese drip. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.