South Indian Filter Coffee

Why is chicory in the blend?

It began as wartime and colonial era economy, since roasted chicory root stretched expensive coffee, but it stayed because the result is genuinely different. Chicory brews darker and thicker than coffee alone, holds its colour in milk, and adds a bittersweet, faintly woody edge that most South Indian drinkers now expect. It also slows the drip slightly, which gives a stronger decoction. Twenty per cent is the usual proportion; blends run from ten to thirty, and above that the coffee flavour starts disappearing behind it.

How long should the decoction take?

Fifteen to twenty minutes for a filter of this size, and a drip that finishes in five minutes has failed. Fast dripping means the grind is too coarse or the disc is not seated, and the result is pale and weak no matter how much powder went in. A drip that has not finished in half an hour means the grind is too fine or the powder has been packed hard, and over extraction makes it harsh and bitter. The powder should be pressed until it just stops shifting, not compacted.

Why pour it between two vessels?

Three reasons, all practical. It mixes the dense decoction into the milk evenly without a spoon, it drops the temperature to something drinkable in a few seconds, and the aeration builds the thick foam that is part of the drink. The height of the pour is what creates the froth, so pouring cautiously from a hand's width apart does very little. It takes practice and a sink to practise over, and the dabara is deliberately wide for exactly this reason.

What goes wrong most often?

Grind, almost always. Filter coffee wants a grind between a fine sand and table salt, noticeably coarser than espresso and finer than a French press; too fine and it chokes, too coarse and water runs straight through. After that it is water temperature, since liquid at a full boil scorches the grounds, and staleness, because ground coffee loses its aromatics within a couple of weeks. Buying small quantities from a local roaster who grinds to order is the single change that improves most home cups.

Is filter coffee better than instant?

In flavour, unambiguously, since instant coffee is brewed, dried and reconstituted and loses most of its volatile aromatics on the way. Nutritionally there is not much between them once milk and sugar are in the cup, and the caffeine content of both varies enough that neither can be called the stronger. The general discussion in is coffee good or bad for you is worth reading if you drink several cups a day, and the beverage nutrition course goes further into how milk, sugar and caffeine interact across the drinks people actually consume daily.

Can the decoction be stored?

Yes, and most households make enough for the day in one go. Decoction keeps for about a day at room temperature and three days refrigerated in a closed glass bottle, though it dulls noticeably after the first few hours. Reheating the decoction alone is fine; reheating mixed coffee is not, because boiled milk coffee develops a stewed flavour and loses all its froth. Make the milk fresh each time and mix at the point of drinking.

What is it drunk with?

A tumbler is standard alongside breakfast across Tamil Nadu and Karnataka, most often with idli and sambar or a dosa, and again in the late afternoon. Compared with a cup of masala chai, filter coffee is usually stronger in caffeine per cup and carries less sugar, though both are mainly milk. Neither is a substitute for water across a hot day, which is worth saying because for a lot of people these two drinks are most of what they drink.