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How to Make Vietnamese Iced Coffee

How to Make Vietnamese Iced Coffee

The phin filter is the only piece of dedicated equipment this recipe requires, and it costs less than a bag of decent coffee. Beyond that: a glass, a kettle, and the ingredients listed above. A kitchen scale is worth using if you have one. The coffee-to-water ratio matters more than most people expect, and eyeballing two tablespoons of ground coffee is less precise than weighing 14g. Bean selection, condensed milk options, and phin troubleshooting are all covered in the third section.

Time Needed: 6 minutes

Total Cost: $ 25

Necessary Supplies

Traditional: Vietnamese-style dark roast coffee. Modern: medium roast Arabica.
Sweetened condensed milk: 30ml (2tbsp), adjust to taste
Hot water, just off boil, 96°C: 120ml
Ice cubes: enough to fill the glass after brewing

Necessary Tools

Phin filter, standard 6-8oz size, 120ml brewing capacity. ($5 to $20)
Glass, minimum 300ml (on hand)
Electric kettle ($20 to $25)
Kitchen scale (optional). ($15 to $25)
Spoon

Step by Step Americano

Step 1: Add the Condensed Milk

Pour 30ml of sweetened condensed milk into the bottom of your glass. Two tablespoons is a reasonable starting point, though the amount is personal: some prefer less sweetness, some notably more. Ask five Vietnamese coffee drinkers how much is correct and you will receive five different answers, each delivered as established fact. Do not stir. The condensed milk will sit as a distinct layer at the bottom while the coffee drips into it from above.

Step 2: Assemble the Phin

The phin has three components: the brewing chamber with its base integrated permanently into the bottom, the dispersion screen, and the lid. Place the brewing chamber on a flat surface and set the dispersion screen and lid to one side for now. The integrated base is designed to rest on the rim of your glass, which happens after the coffee is loaded.

Step 3: Add the Coffee

Weigh out 14g (2 rounded tablespoons) of ground coffee (ground to between a moka pot grind and a pour over grind) and pour it into the brewing chamber. This phin holds a maximum of 15g, so 14g leaves a small margin. If you are grinding fresh, do it now, immediately before adding: the difference in flavour between coffee ground minutes before brewing and coffee ground hours earlier is not subtle. Aim for a fine grind, coarser than moka but finer than pour over, with a granular texture similar to table salt.

Step 4: Level the Coffee

Gently shake or tap the phin to settle the grounds into an even, flat layer across the base of the brewing chamber. You are not compressing the coffee at this point, just ensuring it is distributed evenly before the dispersion screen goes on. An uneven bed of grounds will cause water to find the path of least resistance, which produces uneven extraction and a weaker cup.

Step 5: Screw Down the Dispersion Screen

Drop the dispersion screen into the brewing chamber and screw it down until it makes contact with the grounds and compresses them slightly. Then back it off by exactly one full turn. This creates a small headspace above the coffee bed, which allows for even water distribution during preinfusion and brewing. Too tight and the drip will slow to a near stop; too loose and the pour will disturb the grounds. This is one of those steps where “close enough” is not, in fact, close enough.

Step 6: Pre-Infuse the Grounds

Pour 20 to 30ml of just-off-boil water, 96°C, slowly over the dispersion screen. If using a scale, aim for around 25g. This is the preinfusion, sometimes called the bloom: the grounds will absorb the water, expand, and off-gas, preparing them for even extraction. Let this sit for 20 to 30 seconds before adding the remaining water. You should see the first drops beginning to fall through into the glass below.

Step 7: Fill with Hot Water and Set the Lid

After the preinfusion, pour 90 to 100ml of just-off-boil water slowly over the dispersion screen, bringing the total water used to around 120ml. Then place the lid on top of the phin. The lid is not decorative: the phin brews best when water temperature stays consistent throughout, and losing heat mid-brew will noticeably flatten the extraction.

Step 8: Let it Brew

Set the phin down and leave it to work. The full brew will take four to five minutes for a properly ground and loaded phin. Expect the drip to start slowly, accelerate through the middle of the brew, and taper toward the end. The condensed milk will hold its position as a distinct layer below while dark coffee accumulates above it. The brew is complete when the dripping stops entirely. Four to five minutes. It will feel longer.

Step 9: Remove the Phin

Once dripping has stopped completely, lift the phin straight up and set it aside on a small plate, folded cloth, or its own lid. Before removing, confirm most of the water has dripped through: a significant pool of water still sitting in the chamber after five minutes indicates the grind was too fine or the dispersion screen was set too tight. Both are easy to correct on the next brew.

Step 10: Stir Vigorously

Use a long spoon to stir the contents of the glass with some purpose. The condensed milk at the bottom is thick and will not incorporate on its own: you need to bring it up through the coffee and mix the two layers thoroughly. Stir for a full 20 to 30 seconds, scraping the bottom and sides of the glass. The condensed milk will cool the drink noticeably from its brewed temperature. The result should be a uniform, opaque, caramel-coloured liquid.

Step 11: Add Ice

Fill the glass generously with ice. Vietnamese iced coffee is meant to be properly cold, and a modest amount of ice added to a warm concentrated brew will melt almost immediately and dilute the drink before you get to enjoy it. The brew is calibrated for dilution from ice, so pack the glass fully and do not hold back.

Step 12: Stir and Serve

Give the iced coffee one more thorough stir to bring everything together and ensure the drink has chilled evenly. Serve immediately. Vietnamese iced coffee does not improve from sitting: the ice will continue to melt and the balance between coffee concentration and sweetness will drift. Drink it while it is cold and the flavour is at its peak.

The PhinWhat it Is and How it Works

The phin is a single-serve metal drip brewer, and it is the only piece of equipment that makes Vietnamese coffee what it is. Everything else in this recipe – the glass, the kettle, the grinder, the spoon –  you almost certainly own already. The phin is worth understanding in some mechanical detail, because the way it works explains why small adjustments in grind size or dispersion screen setting produce noticeably different results in the cup.

The design is uncomplicated. The brewing chamber has a perforated filter built permanently into its base and sits directly on the rim of your glass. Water poured in passes through the coffee bed and drips through the perforated base into the glass below. No paper filters are involved at any stage, which means the coffee oils stay in the cup. This contributes meaningfully to the body and texture of the finished drink, and it is one of the reasons phin-brewed coffee has a richness that drip machines with paper filters cannot replicate.

Two types of dispersion screens exist. The gravity type rests on the coffee bed by its own weight and offers limited control. The screw-down type, used in this How To, lets you dial in the headspace above the grounds with more precision. Tighten until you feel the resistance of the coffee, then back off exactly one full turn. That headspace allows for the bloom during preinfusion and governs how quickly water passes through the bed. The one-turn rule is not approximate.

The slow drip is definitely not a failure in design. The four to five minute target brew time (which, for 120ml brewed is a long time!) produces a concentrated, full-bodied cup with the extraction depth to cut through a significant amount of sweetened condensed milk without disappearing. And remember, you have ice that’s going to be diluting things even more later on. Faster brews produce a thinner, weaker result; we don’t want that. Slow and low flow is the way to go. Grind size and dispersion screen tension are your primary variables.

Phins come in sizes ranging from 120ml up to 300ml and larger, though you’ll often see them represented in US fluid ounces in the States. The 120ml single-serve size (6 or 8oz) is the most common and is what this recipe is built around. The lid, it is worth noting, doubles as a stand for the brewer once you lift it off the glass: set the phin on it inverted to catch any residual drips while you stir. Pretty nifty engineering and design for a device that can cost less than $15.

Where the phin came from is not entirely settled. The obvious assumption is the French press, but the mechanical similarities are thin. A more plausible lineage runs through the French biggin, a vintage single-serve drip brewer common in the 19th century, or possibly through the Madras filter, a similar metal drip device used in colonial India during the same period. Whatever the direct ancestor, Vietnamese makers adapted the concept using affordable aluminum and stainless steel, reduced it to a three-part single-serve format, and eliminated paper entirely. The result was a brewer that could be manufactured cheaply, cleaned in seconds, carried anywhere, and operated without electricity.

It remains all of those things today.

Coffee Phin

A standard 6oz / 120ml phin, on it’s side, showing the filter design and “lip” for sitting directly on a cup.

Cà PhêWhere it Came From

Coffee arrived in Vietnam in 1857, brought by French missionaries who planted the first arabica seedlings in the north of the country. Vietnam was formally colonised by France the following year, and the colonial government eventually identified the Central Highlands, particularly the Dak Lak Province, as ideal growing territory. Large-scale plantations were established in the early 20th century. Robusta was introduced to the region in 1908. It was hardier than arabica, better suited to the elevation and climate, and it spread quickly.

Today, Vietnam produces over 95% of its coffee as Robusta, accounts for approximately 40% of global Robusta supply, and sits second only to Brazil among the world’s coffee-producing nations.That trajectory, from a single arabica tree to the world’s dominant Robusta producer in under 170 years, is one of the more remarkable – and controversial – agricultural stories of the 20th century.

The condensed milk connection is older than the coffee culture it came to define. Fresh milk could not survive the tropical climate reliably, and whatever dairy was available in the colonial period was expensive and inconsistent. Sweetened, condensed milk, first developed in Napoleonic times (interesting history, by the way!) could be stored on a shelf indefinitely, cost considerably less, and doubled as both dairy and sweetener in a single ingredient. French colonists drank café au lait; Vietnamese coffee drinkers used what was actually available, and what was available turned out to work better than expected.

The condensed milk complemented the bitterness of dark-roasted Robusta in a way that fresh milk probably would not have, and what began as a practical workaround became the defining characteristic of the drink. The French colonial period ended with the Geneva Convention in 1954. The condensed milk stayed, and no one has complained about that since.

The phin stayed embedded in daily life through the post-colonial period, through the Vietnam War, and through the economic disruptions that followed. The Doi Moi reforms of 1986 reopened Vietnamese agriculture to private enterprise, coffee production expanded rapidly, and by the early 2000s Vietnam had become one of the world’s dominant coffee exporters. The phin and cà phê sữa đá came along for the entire ride, which, all things considered, is an interesting contribution to a complicated history.

Robusta Laden Trees in Vietnam

Robusta branches in Gia Lai province. Source: DRWakefield / Understanding the Landscape of Vietnamese Coffee

Coffee UsedArabica, Robusta, and a Persistent Myth

Traditional Vietnamese iced coffee uses dark-roasted Robusta, and the reasoning is not complicated. Robusta has roughly double the caffeine content of arabica, a more aggressive natural flavour profile, and a bitterness that, taken to a dark roast, develops into something closer to deep and smoky than simply unpleasant. The condensed milk is calibrated against that bitterness. The two ingredients have a relationship, and changing one significantly means reconsidering the other.

The specialty approach, medium-roasted arabica or a quality Robusta-arabica blend, produces a noticeably sweeter, more nuanced cup. The condensed milk ratio needs less adjusting upward, and the drink reads as more balanced and accessible to palates that find traditional Robusta challenging. It is also, as noted in the recipe, not a 100 percent authentic preparation. Does that matter? That depends entirely on why you are making it. Both approaches produce a worthwhile drink. They are simply different drinks, and both are welcome here.

One thing that is definitively not part of authentic Vietnamese coffee: chicory.
This misconception has circulated online for years, largely because Café Du Monde,the New Orleans brand with the distinctive green tin, produces a coffee-and-chicory blend that became attached to Vietnamese iced coffee recipes in North America. Café Du Monde is a Louisiana product with Louisiana roots, its chicory use a legacy of Civil War-era coffee shortages with no connection to Vietnam whatsoever.

Vietnamese coffee in Vietnam does not use chicory. The flavour overlap with dark-roasted Robusta is coincidental rather than intentional. Use Café Du Monde if you enjoy it, but know what you are actually making when you do.

On grind: the fine setting specified in the steps, coarser than moka but finer than pour over, is deliberate. A coarser grind passes through the phin too quickly for the concentration this recipe requires. Start fine and adjust coarser only if your brew times are running significantly past five minutes.

The Grind Used

The Phin uses a coffee ground about halfway between a moka pot and a pour over grind. Similar to some finer Aeropress level grinds.

Sweetened Condensed MilkNot a Garnish

Do not use evaporated milk. This is the most common substitution error in Vietnamese iced coffee, and it does not work. Evaporated milk is unsweetened, thinner in consistency, and structurally wrong for this recipe.

Sweetened condensed milk is cooked down to roughly 40 percent of its original volume with significant added sugar, and that sugar is not incidental. It is what the recipe is built around. Adding sugar separately to evaporated milk will not replicate what condensed milk brings to the glass. The answer is just to buy the right thing.

The most traditional brand in Vietnam is Longevity, known in Vietnamese as Ông Thọ, and it is the condensed milk most closely associated with the drink in its home country. In North America, Eagle Brand and other Western equivalents are widely available and perform well. Flavour differences between brands are real but not significant enough to drive strong opinions either way.

The more important variable is how much you use. The 30ml starting point in this recipe is deliberately moderate. It produces a drink that reads as sweet without becoming a dessert. Some Vietnamese coffee drinkers would find it timid. Adjust freely, but adjust with intention: you can always add more condensed milk, but just like saying something very awkward at your buddy’s wedding reception, you cannot take it back… once it’s been invited to the party.

If you are avoiding dairy, coconut condensed milk has become more widely available and works reasonably well. The flavour shifts, and the result is its own thing rather than a faithful replica, but it holds together in the glass. Oat and almond-based alternatives tend to separate and are harder to recommend.

Hot VersionCà Phê Sữa Nóng

The phin was not designed for iced coffee specifically. It was designed for coffee, served hot or cold depending on the season and the occasion. Hot Vietnamese coffee, cà phê sữa nóng, uses exactly the same equipment and the same general method, with a few adjustments that help tune the output in the cup.

Reduce the coffee dose to approximately 8 to 10g per 100ml of water. The concentrated ratio used for iced coffee is calibrated for dilution from ice, and without that dilution a full 14g dose in a hot preparation can push the cup into over-extracted territory. There is no ice coming to rescue it, so dial back the dose.

Reduce the condensed milk as well: start at 15 to 20ml and adjust upward from there. Brew times shorten slightly to around three to four minutes with the lower coffee mass.

The most distinctive element of traditional hot preparation is what happens to the glass while it brews. In Vietnam, the glass with the phin sitting on top is placed inside a flat-bottomed bowl of near-boiling water during the brew. This keeps the contents warm while the coffee drips through, which takes longer than most people accustomed to faster brewing methods expect.

It is a simple solution that requires nothing you do not already have in your kitchen (a wide shallow bowl is all), and it makes a meaningful difference if you plan to sit with the drink while it brews rather than hurrying it along.

Which, to be clear, is exactly how this drink is meant to be approached.

VariationsWorth Knowing

Thai iced coffee follows the same phin-based method with spices added directly to the brewing chamber along with the coffee grounds. Aim for approximately 2 teaspoons of mixed spices total, with ground cardamom making up the majority and a smaller amount of ground cinnamon rounding it out. A few drops of almond extract added to the glass before brewing completes the combination.

The condensed milk in Thai iced coffee is sometimes added after the brew rather than before, producing a layered visual effect that is tempting to do at least once for the presentation alone. Of course, stir before drinking; presentation is one thing, but getting a mouthful of thick condensed milk first is another.

Cà phê trứng, or egg coffee, deserves considerably more than a footnote. It was created in Hanoi in the 1940s by Nguyen Van Giang, a bartender at the Metropole Hotel during a period when fresh milk was scarce due to wartime disruption.

His solution was to whip egg yolks with condensed milk and sugar into a dense, custard-like foam and spoon it over strongly brewed phin coffee. The egg foam tastes nothing like the name implies: whipped with condensed milk into a dense, sweet custard, it reads more like crème brûlée than breakfast, and the contrast with the bitter phin coffee beneath it is the entire point of the drink.

It is the same story as cà phê sữa đá at its core: scarcity forcing an improvisation that turned out to be better than what it replaced. The drink became closely associated with Hanoi, where Giang’s family later opened a café that still operates. It is traditionally served hot in a small cup resting in a bowl of warm water to hold the temperature, and it is a legitimate piece of Vietnamese culinary history. The viral-y social media version of it, treated as a novelty or a trend, does not do it justice. It warrants its own dedicated How To, and that is probably where we will eventually get to it.

Concluding Thoughts

Vietnamese iced coffee is one of those recipes that rewards time spent understanding it. The phin is an inexpensive piece of kit with considerably more to teach than its price tag implies, and the drink it produces, once your grind, dose, and condensed milk are dialled in to your taste, is one of the more satisfying things you can put together at home.

If you find a ratio, a roast, or a variation that works better for you than what is here, the comments section exists for exactly that reason. And if you end up making the hot version on a grey winter morning and find yourself wondering why you waited this long, that reaction is noted and not at all surprising.

Stir it Up

Stirring and mixing the thick, sweetened condensed milk is part of the ritual of making an authentic Vietnamese Iced Coffee.