A measured concentrated starting point
Use a phin large enough for 20 g coffee and 100 g water in stages, a sturdy heat-safe cup, scale and kettle. Start with medium-fine coffee at 94°C / 201°F. Phin sizes and insert designs vary: some use a loose gravity insert, others a screw adjustment.
This editorial recipe uses 1:5 coffee to brew water and is intended to be concentrated. Expect less than 100 ml in the cup because liquid stays with the grounds; about 60 ml is a rough planning estimate at 2 g/g retention. Measure your actual output for repeatable serving.
| Stage | Amount or cue |
|---|---|
| Coffee | 20 g |
| Bloom water | 20 g |
| Bloom wait | 30–45 seconds |
| Main water | 80 g more, for 100 g cumulative |
| Water temperature | 94°C / 201°F |
| Observe total drip time | About 4:30–6:00 as a starting diagnostic, not a pass/fail rule |
Evidence: ANDAO: phin brew guide, timing and adjustment examples
Seat the insert lightly; let gravity do the work
Do not copy espresso tamping pressure into a small gravity brewer. A tight bed can block the flow, and the hot metal needs careful handling.
- Rinse and warm the phin and cup, then discard that water. If making condensed-milk coffee, add the chosen milk to the empty cup now.
- Put the base and chamber securely over the cup. Add 20 g coffee and shake gently to level the bed.
- Set the insert on the coffee. For a screw type, use its intended light adjustment rather than tightening it into a compressed puck.
- Start the timer and add 20 g hot water. Wait 30–45 seconds for the coffee to wet.
- Add 80 g more, stopping at 100 g cumulative and keeping below the chamber's safe fill level. Put the lid on.
- Let it drip without stirring or pressing the hot insert. Note the main-drip finish time, lift the phin safely and mix the cup.
- Taste black after cooling a little, or stir thoroughly into condensed milk before adding ice.
Evidence: ANDAO: phin brew guide, timing and adjustment examples
Three distinct ways to serve the same brew
The brew is a base, so use the actual recovered coffee when planning its serving. Sweetened condensed milk is dense and sweet; weighing it is easier to repeat than a heaped spoon. It commonly contains dairy, so check the exact product.
| Drink | Starting serving choice | Adjustment |
|---|---|---|
| Hot black | Drink the recovered brew in a small cup | Add a little hot water if too concentrated. |
| Iced black | Pour the mixed brew over about 80 g ice | Remember dilution increases as the ice melts. |
| Condensed milk and ice | Begin with 20 g sweetened condensed milk under the brew; stir, then add 80 g ice | Change milk by 5 g on the next cup to tune sweetness. |
| Plant-based alternative | Use a suitable labelled condensed or barista-style product | Check ingredients, allergens and sweetness; it will not necessarily behave like dairy condensed milk. |
Use both flavor and drip behavior
Keep the dose, total water and coffee the same while you change grind. Timing depends on the phin's openings and insert, not just the coffee.
| Problem | First test |
|---|---|
| Rushes through and tastes thin | Try slightly finer grounds; verify the insert is seated evenly. |
| Barely drips | After safe cooling, inspect blocked holes. Next brew use coarser grounds and lighter insert pressure. |
| Sour but normal flow | Try a small finer change or slightly hotter water on a later test; also consider the coffee's natural acidity. |
| Bitter and very slow | Use coarser grounds or a less compressed bed, one change at a time. |
| Balanced but too strong | Dilute the cup; do not force a faster extraction only to weaken it. |
| Watery after ice | Measure serving ice and allow for its melt before increasing the coffee dose. |
| Grounds in the cup | Check the base seating, damaged parts and whether grind is excessively powdery. |
Clear every perforated part
Let the metal cool before lifting out the insert. Empty the grounds, wash the chamber, base, insert and lid with suitable dish-cleaning products, rinse and dry. Check the small holes for trapped particles without enlarging them.
A phin can brew many coffees; Vietnamese coffee should not be reduced to a single roast, species or compulsory sweetener. Choose a coffee you enjoy and describe the actual recipe rather than treating origin as a guarantee of one flavor.
Explore the coffee history and living traditions guide for context beyond this one serving recipe, including Vietnam's varied café drinks and other regional preparations.
Sources & limitations
This guide combines source-based explanations and practical starting points. Coffee Jacob has not performed hands-on product testing or controlled tasting trials for this guide. Source check: 13 October 2026.