Making Filter Coffee Properly: The Dabara-Tumbler Method

South Indian filter coffee is as much about the method as the beans — the traditional two-chamber metal filter (a davara-tumbler set alongside it for serving) produces a slow-dripped decoction that's genuinely different from an espresso or a plain instant mix. Kumbakonam-style coffee and Narasu's coffee are both ground specifically for this method, and getting the process right matters as much as which brand is in the tin.

How the filter works

The traditional filter has two chambers: a perforated upper chamber where the ground coffee sits (usually pressed down with a small metal disc called a pressure plate), and a lower chamber that collects the decoction as hot water is poured over the grounds and allowed to slowly drip through. The whole process takes anywhere from 15 minutes to a couple of hours depending on how slow the drip is — this isn't a quick pour-over, and rushing it by using boiling-hot water or skipping the pressure plate tends to produce a weaker, less concentrated decoction.

"Degree coffee" and what the name refers to

The term "degree coffee" traditionally refers to filter coffee made with fresh, undiluted milk rather than a milk-powder mix — the name is said to come from using a lactometer to check milk purity, a piece of dairy-trade history rather than anything about the coffee itself. In practice, it's used today mostly to signal a coffee blend or preparation aimed at that traditional, full-bodied style, mixed with hot milk in the classic proportions rather than served black.

Assembling a cup

• Brew the decoction in advance using the metal filter — a batch can be made ahead and kept warm for multiple servings through the morning.
• Heat milk separately until just below boiling; South Indian filter coffee is traditionally served with a generous proportion of milk rather than black.
• Combine decoction and hot milk in the tumbler, adding sugar to taste, then pour back and forth between tumbler and davara a few times — this aerates the coffee and is part of what builds the characteristic light froth on top.
• Serve hot, in the tumbler set inside the davara, which also functions as a saucer to cool a small amount for the first sip.

Storing coffee powder

Ground coffee loses its aroma faster than whole beans, so buying a size you'll get through in a few weeks, rather than stocking up heavily, keeps the flavour closer to fresh. Store in an airtight container away from heat and sunlight — a coffee tin left near the stove loses its edge faster than one kept in a cool cupboard.

Choosing between blends

Coffee blends sold for filter brewing generally differ in two ways: the roast (lighter roasts taste brighter and more acidic, darker roasts more bitter and full-bodied) and whether chicory has been added. Chicory-blended coffee, common in South Indian filter coffee, gives a slightly different, less purely coffee-forward flavour and a darker colour to the decoction — some households prefer it specifically for that character, others prefer a pure coffee blend without it. There's no single "correct" choice; it comes down to what a household has grown up drinking, and trying a couple of different blends side by side is the most reliable way to settle on a preference.

The full range of filter-coffee blends, along with tea for households that split mornings between the two, is in the tea & coffee category. Express delivery in about 60 minutes if the tin runs out before the filter's even been set up.