South Indian filter coffee: the decoction, the ratio, the pour

A filter coffee is decided before it reaches the cup: in the ratio of coffee to chicory in the tin, in how tightly the grounds are packed under the disc, and in how many times the drink crosses between the tumbler and its davara before anyone sits down to drink it. None of this is decoration. The chicory content is bound by a food safety regulation with an exact percentage floor, and the beans usually come from two Western Ghats districts that each hold a government-registered name of their own.

The apparatus has barely changed in a century. Two stainless steel cups, one sitting inside the rim of the other, do the job an espresso machine does with nine bars of pump pressure. Here there is no pump. Water sits over packed grounds and drips through by gravity alone, and the coffee tastes like that difference: heavier, slower to develop, harder to rush.

The filter does the work, not a machine

The upper cup holds the ground coffee under a perforated pressing disc, sometimes weighted, that keeps the bed compact so water cannot punch a channel straight through it. Hot water goes in above the disc and finds its way down through the grounds rather than around them. What collects in the lower tumbler is the decoction: concentrated, close to syrupy, meant to be diluted rather than drunk on its own.

How long that drip takes is not fixed by any standard. It is set by the grind, by how hard the disc presses the bed, and by how much water goes in at once. A finer grind or a tighter pack slows the flow and pulls more out of the same coffee, which is one reason the same tin tastes different depending on who filled the filter that morning. A coarser grind lets water through fast and leaves the decoction thin, however long it is left standing.

Two beans from two hills

The classic filter blend draws on two coffee species grown a few hundred kilometres apart, both registered as geographical indications by the Coffee Board. Coorg Arabica Coffee, from Karnataka, was granted Geographical Indication status under application number 604 on 1 March 2019. Wayanaad Robusta Coffee, from Kerala, was registered the same day, under application number 605.

Arabica and Robusta bring different things to a blend: aroma and acidity from one, body and a heavier caffeine content from the other. Which bean dominates a given tin is a house decision, not a regulated one. The geographical indication protects the name of the growing area. It says nothing about how the two are supposed to be mixed.

The roast, and what chicory does to it

Neither the regulation nor the two geographical indication certificates say anything about roast degree. That is left to the roaster. In practice, South Indian filter coffee tends toward a darker roast than a filter blend sold for a drip machine elsewhere, because it is going to be cut with chicory and diluted again with hot milk. A light roast would barely survive both steps.

Chicory is roasted separately, before it goes anywhere near the coffee. Under Indian food law, chicory means the roasted, ground root of the chicory plant, Cichorium intybus, cleaned and dried before roasting, with sugar or edible fat permitted only up to 2 per cent of its weight. It carries no caffeine of its own.

That absence shows up in the numbers. Roasted and ground coffee sold on its own must contain at least 1.0 per cent caffeine on a dry basis. Once chicory is added, the caffeine floor for the finished coffee-chicory mixture drops to 0.6 per cent, precisely because part of the tin is no longer coffee. The gap between those two figures is a rough measure of how far a blend can lean on chicory before it stops behaving like coffee.

The law behind the blend

The Food Safety and Standards (Food Products Standards and Food Additives) Regulations, 2011, set the floor directly. Under Regulation 2.10.4, a coffee-chicory mixture must contain coffee to the extent of not less than 51 per cent by mass. Below that line, the product falls outside the definition altogether. The same clause sets moisture, ash and extract limits for the finished mixture, reproduced below as published by the Food Safety and Standards Authority of India (FSSAI).

The label has to say so. Regulation 2.10.4 requires the percentage of coffee and chicory used to be marked on the pack. As of September 2026, that declaration is about to move to the front of it. The Food Safety and Standards (Labelling and Display) First Amendment Regulations, 2025, gazetted on 12 August 2025, replace the existing sub-paragraph on coffee-chicory mixtures with a fixed format: the words "COFFEE BLENDED WITH CHICORY", followed by the coffee and chicory percentages, printed where a buyer can see them without turning the pack over. Instant coffee-chicory mixtures get the same treatment, labelled "MADE FROM BLENDS OF COFFEE AND CHICORY". The change takes effect on 1 July 2026. Not before.

Milk near the boil

Where filter coffee is served with milk, the milk is heated close to its boiling point rather than merely warmed, and the decoction is added to the hot milk rather than the other way round. A cooler pour flattens the drink and lets chicory's bitterness sit on top instead of working through it. Sugar, where it is used, tends to go in before the pour rather than after, so it dissolves into the hot liquid instead of settling at the bottom of the tumbler.

The davara, the tumbler and the pour

The two vessels are not decorative. The davara is the wide, shallow saucer; the tumbler is the smaller cup that sits inside it. Pouring the mixed coffee from a height, tumbler to davara and back, does three distinct things: it cools a drink that would otherwise be too hot to hold, it raises a shallow foam on top, and it works the sugar through the decoction and milk evenly rather than leaving it to settle. Stirring with a spoon achieves none of the three.

The davara also catches spillage, and in some households it is the vessel the coffee is cooled into and drunk from directly, tipped into the mouth without the rim touching the lips. The pour is judged by how much foam it raises and how little coffee lands outside the vessel, and a practised hand can do both from a good arm's length.

Until 1 July 2026, a coffee-chicory pack sold in India can carry any label wording the seller likes, so long as the fine print somewhere states the coffee and chicory percentages. After that date, the two numbers move to the front of the pack, printed in the format the gazette sets out, whether the blend is 51 per cent coffee or 95.