Preparation method — Indonesia
Kopi tubruk
Coffee grounds and sugar in the glass, boiling water poured straight on, no filter of any kind — Indonesia's everyday coffee, and the simplest preparation in the atlas.
- Country
- Indonesia
- Where
- Throughout Indonesia, particularly Java and Bali.
- Brewing mechanism
- Immersion steep
- Heat technique
- Water poured from elsewhere
- Filtration
- None — grounds stay in the cup
- Grounds in the cup
- Yes — by design
- Grind
- Fine, though not as fine as Turkish — fine enough to extract quickly, coarse enough to settle within a couple of minutes.
- Coffee-to-water ratio
- 35–70 g per litre (typically 50)
- Serving size
- 150-250 ml
- Water temperature
- 95-100°C (typically 98)
- Contact time
- 120-300 seconds (typically 180)
- Preparation time
- 2-5 minutes
Local names
- Indonesian
- kopi tubrukKOH-pee TOO-brookTubruk carries a sense of collision — the water striking the grounds.
What it is
Kopi tubruk has no equipment. Finely ground coffee and sugar go into a glass, boiling water is poured directly onto them, the mixture is stirred, and it is left for a couple of minutes for the grounds to sink. It is then drunk from the top down, leaving the sediment. That is the whole preparation.
Calling it crude misses what it is: an unfiltered steep at a high dose in the vessel it is served in, which produces a heavy, sweet, intensely aromatic cup, and it is what most Indonesians actually drink. Indonesian coffee, mostly robusta and often roasted very dark, suits it — the sediment is fine enough to settle firmly and the sugar is stirred in while the water is at its hottest.
It is the base of a good deal else. Kopi joss, the charcoal coffee of Yogyakarta, begins as a glass of tubruk. So does much of what is served at angkringan carts and warungs.
What makes it distinct: Zero equipment and zero filtration: the grounds are never separated from the drink at any point, only allowed to sink.
Cultural context
The default domestic and street coffee. Served at warungs, at home and at roadside carts, in a glass rather than a cup, and drunk slowly enough that the grounds stay down.
How it is made
The grounds steep in hot water off the heat, then settle or are separated.
The glass is never heated. All the heat arrives with the water, which is one reason the brew stops extracting relatively quickly as it cools.
- Put ground coffee and sugar into the glass.
- Pour boiling water directly onto the grounds.
- Stir once to disperse the coffee and dissolve the sugar.
- Leave it to stand until the grounds settle to the bottom. (about 3 minutes)
- Drink from the top, leaving the sediment layer behind.
- Sugar
- Added at the start with the grounds, and standard rather than optional; unsweetened tubruk exists but is not the default.
- Milk
- Not in tubruk itself. Condensed milk makes it kopi susu, which is a related but distinct order.
How it is served
A clear glass, so the settled layer is visible and the drinker can judge it.
Served with: Fried snacks, Kretek cigarettes, traditionally
When: Morning and evening; a constant.
Taste
Tendencies of the preparation, not a prediction about any particular cup.
- Body
- High
- Clarity
- Low
- Sediment in the cup
- High
- Perceived strength
- Medium-high
- Bitterness tendency
- Medium-high
- Acidity tendency
- Low
- Sweetness tendency
- High
What the method does
Unfiltered immersion in the serving glass: all the oils and a good deal of fine sediment stay in, so body is high and clarity is nil. Because the water cools steadily from the moment it is poured, extraction is gentler than a boiled decoction of the same grind — the cup is heavy without being as harsh as its appearance suggests.
What the tradition does
Dark-roasted robusta and generous sugar dominate. The aroma released by pouring boiling water directly onto dry grounds in an open glass is a real and often-remarked part of the experience.
What the method does not control
Indonesian coffees vary widely — a Sumatran wet-hulled arabica and a Java robusta behave very differently here.
- Texture
- Heavy, with a distinct silt layer that is not drunk.
- Aroma
- Strong at the moment of pouring; toasty and dark.
- Aftertaste
- Heavy and sweet, cut short by the grit that arrives if the glass is tipped too far.
Caffeine
Moderate concentration in a fairly large glass, so total caffeine is comparable to a mug of filter coffee — higher where robusta is used. The dose per litre is lower than most people assume, because the visual of undiluted grounds suggests more coffee than is actually there.
CoffeeHQ states no milligram figure for this preparation, because no measurement specific to it has been established. Inventing one would be easy and wrong.
What moves the number
- Robusta versus arabica
- Dose, which is by eye
- How much of the glass is drunk before the sediment
How it differs from
- French press
- Both are full immersion with no paper. A French press separates the grounds mechanically at the end with a mesh plunger; tubruk never separates them at all and relies on gravity plus the drinker stopping short of the bottom. Tubruk is also finer-ground and sweetened in the glass.
- Turkish coffee culture and preparation
- Both end with grounds in the vessel, but tubruk is never heated on a flame — water is poured on and the brew cools from there — and the grind is coarser. The Turkish cup is roughly three times the concentration in a third of the volume.
In practice
Common mistakes
- Drinking it too soon, before the grounds have settled
- Stirring again after settling
- Grinding as fine as for Turkish coffee, which never fully settles
- Draining the glass
Household and regional variation
Dose, sugar and grind are all by eye and vary widely.
Modern adaptations
Instant coffee has displaced it in many households; specialty cafés in Indonesia have begun serving tubruk deliberately with single-origin coffee.
Misconceptions
- That it is just badly made coffee. It is an established preparation with a settling step that is part of the method.
Related preparations
Elsewhere on CoffeeHQ
History, culture and background
Evidence
What CoffeeHQ could not establish
- Dose is universally described by eye, so the ratio range given is reconstructed from typical descriptions rather than measured practice.
- Regional variation across the Indonesian archipelago is substantial and poorly documented in English.
Sources
- Atlas Obscura and Gastro Obscura food and drink documentation — Atlas Obscura
- The World Atlas of Coffee
- Sprudge coffee industry journalism — Sprudge Media Network