South Indian Filter Coffee

South Indian filter coffee, or filter kaapi, is made in a simple two-part stainless steel filter. The upper chamber, with a perforated base, holds the coffee, often blended with chicory. Hot water drips slowly through it into the lower chamber, making a strong decoction. That decoction is mixed with hot milk and sugar, then poured between a tall steel tumbler and a wide davara until it froths. Here’s how to make it.

The short version

• A two-part steel filter: coffee on top, decoction collects below.
• About 15 g of fine coffee per cup, often 80:20 coffee to chicory.
• Let it drip slowly, 10 to 20 minutes or longer.
• 1 part decoction to 2 to 3 parts hot milk, with sugar to taste.
• Pour between the tumbler and davara to froth and cool it.

How does a South Indian filter work?

The filter is two stainless steel cylinders that stack. The upper one has a finely perforated base and holds the coffee, with a pressing disc (an umbrella-shaped plate with a handle) resting on top to spread the water. The lower one collects the decoction. You pour hot water into the top; gravity pulls it slowly through the coffee and the holes into the bottom. It works like a Vietnamese phin, but with a much longer, slower drip that makes a concentrate meant for mixing with milk.

What coffee should I use?

South Indian filter coffee is usually made from a fine coffee powder blended with chicory. Tiny Tiger Coffee calls 80:20, coffee to chicory, the classic blend, and says most shop-bought powders are closer to 70:30. Pure coffee makes a cleaner, lighter cup; more chicory gives a darker, thicker, more bitter one.

Fine doesn’t mean flour. Tiny Tiger suggests the texture of fine rava (semolina): sand with a little powder in it. Too coarse and the water races through, giving a thin, sour decoction; too fine and the filter stalls.

How much coffee and milk should I use?

	Amount
Coffee	About 15 g (two heaped tablespoons) per cup
Blend	Often 80:20 coffee to chicory
Water	Just off the boil (some use boiling)
Drip	10 to 20 minutes or longer
In the cup	1 part decoction to 2–3 parts hot milk

The 1:2 to 1:3 range comes from Chai Coff: 1:2 is strong, “degree coffee” territory, and 1:3 is gentle. Tiny Tiger’s cup is milder still: about 30 ml of decoction to 120 ml of hot milk (about 1:4), or 40 ml of decoction for a stronger one. Tiny Tiger also notes that a 200 ml filter makes two cups, and three or four heaped spoons of coffee give about 60 ml of decoction.

How do you make filter kaapi, step by step?

1. Load the filter with about 15 g of coffee, level it and rest the pressing disc on top.
2. Wet the coffee with a little hot water and let it sit briefly.
3. Fill the top with water just off the boil (some families use boiling water) and put the lid on.
4. Leave it to drip, undisturbed, for 10 to 20 minutes or longer.
5. Heat the milk until steaming and nearly boiling.
6. Mix decoction and milk in the tumbler, with sugar to taste.
7. Pour between the tumbler and davara four to seven times (Chai Coff says 4 to 6, Tiny Tiger six or seven), from a growing height, and serve the tumbler sitting in the davara.

Brew mode on this page times the drip for you.

How long should the decoction drip?

Guides vary widely. Tiny Tiger suggests about 10 to 20 minutes and Chai Coff 10 to 15, while traditional recipes such as Saffron Trail’s leave it for 3 to 4 hours until a thick decoction has collected. The longer and slower, the stronger the decoction. Many households brew it at night for the morning, and Tiny Tiger says the decoction keeps in a covered jar in the fridge for two days.

Why pour between the tumbler and davara?

Pouring the coffee back and forth from a height froths it, cools it to a drinkable temperature and dissolves the sugar. It’s also part of the ritual: the coffee is served in the tumbler, standing in the davara.

Filter kaapi vs other drip brewers

	South Indian filter	Vietnamese phin	Moka pot
How it brews	Slow gravity drip	Gravity drip	Steam pressure
Coffee	Fine, often with chicory	Medium-fine	Fine
Result	A decoction for mixing with milk	A strong cup, often with condensed milk	Strong stovetop coffee
Time	10 minutes to hours	About 5 minutes	About 5 minutes

General guidance only. Steel tumblers and davaras get very hot: hold them by the rim, take care when pouring from a height, and keep the decoction in the fridge if you make it ahead.

Filter kaapi vs other methods

• Vietnamese phin: a single-cup metal drip filter.
• Chicory coffee: coffee blended with roasted chicory root.
• Moka pot: strong stovetop coffee by steam pressure.
• Turkish coffee: another very fine, traditional coffee.

Explore every metal-filter method in the gravity chapter.