Iced Filter Coffee at Home: How We Make It

The Kaapiswada family · 2026-10-07

Iced filter coffee is the same decoction you make every morning, brewed a little stronger, cooled, and poured over ice and cold milk. That is really all there is to it, and the only thing that goes wrong is a glass that tastes watery, which a few small habits fix.

Filter kaapi is how we drink our coffee at home, hot, from the davara and tumbler. Iced filter coffee is simply another way to enjoy the same decoction on a warm afternoon. Our coffee grows in the shade-grown rows of our family estate in the Mullayanagiri foothills of Chikmagalur, where the cherries are hand-picked and then dry slowly in the hill sunlight. Whether we drink it hot or cold, it starts the same way: a good decoction.

What you need

  • Filter coffee powder (like Kaapiswada Swadamalnad: our 80:20 blend made with single-estate Arabica from our own family estate in Chikmagalur)
  • A steel filter, or a vessel and fine tea strainer if you have no filter
  • Water just off the boil
  • Cold milk, straight from the fridge
  • Ice cubes
  • Sugar, if you take it

How we make iced filter coffee

  1. Brew a strong decoction. Make it the way you always do, then lean towards stronger. In a regular four-cup steel filter we use two to three heaped tablespoons of powder; for iced kaapi we stay at the top end. If you have never brewed a decoction before, our guide on how to make filter coffee at home walks through every step.
  2. Stir in the sugar while it is warm. Sugar dissolves easily in warm decoction and stubbornly in cold milk. If you take it sweet, add it now.
  3. Let it cool. Leave the decoction on the counter for 10 to 15 minutes, then put it in the fridge for 20 to 30 minutes. Hot decoction poured straight onto ice melts the cubes at once and waters the glass down before you take a sip.
  4. Build the glass. Fill a tall glass with ice, pour in the cold milk, then pour the chilled decoction over the top and stir well.
  5. Taste and adjust. If it tastes thin, add a little more decoction now and a spoon more powder next time. Change one thing at a time so you know what worked.

Want it thick and frothy, more like a café cold coffee? Put the cold milk, the cooled decoction and a few ice cubes in a blender and run it until smooth. The ice makes it thicker and creamier.

Why iced filter coffee turns watery

Ice is water. As it melts, it thins everything in the glass. A cup of hot kaapi only has to stand up to milk; an iced one has to stand up to milk and melting ice. That is why the decoction needs to start stronger and colder.

Three habits keep the glass tasting of coffee:

  • Use more decoction to the same milk. Our hot kaapi is roughly one part decoction to three parts milk. For iced, push it a little stronger than your usual cup.
  • Cool the decoction first. Cold decoction melts the ice slowly, so the last sip tastes like the first.
  • Freeze decoction into ice cubes. If you have leftover decoction, pour it into an ice tray. When those cubes melt, they add more coffee to the glass instead of water.

Swadamalnad or Pureswada for iced coffee?

Both work. They just give you a different glass.

A coffee-chicory blend gives a darker decoction with more body. Chicory is a roasted root, and it is the reason a traditional filter decoction looks near-black and holds up against milk. That body helps over ice too, so the 80:20 blend (like Kaapiswada Swadamalnad: 80% single-estate Arabica from our own Chikmagalur estate and 20% chicory) is a good pick if you want an iced kaapi that still tastes like the one from the tumbler.

If you prefer a cleaner cup that tastes only of coffee, pure Arabica works well (like Kaapiswada Pureswada: 100% single-estate Arabica from our own family estate, no chicory). The decoction is lighter in body, so use about half a tablespoon more powder than you would with a blend, the same adjustment we make for hot kaapi. You can see both, along with our whole beans, on our coffee page. We send them across India.

Keeping decoction for iced coffee

Decoction is at its best on the day you brew it. Hot or cold, we drink ours the same day, because by the next morning much of the aroma has gone.

Iced filter coffee is a good way to use what is left in the filter after the morning cups. If you do have extra, let it cool, pour it into a clean airtight container, keep it in the fridge and use it within a day. Or freeze it into ice cubes for your next glass.

Fresh decoction also needs fresh powder. Keep an opened pack sealed, dry and away from the stove, and close it straight after every use.

Questions people ask

Can filter coffee be used to make cold coffee at home?

Yes. Brew a strong filter decoction, let it cool, then pour it over ice and cold milk and stir. For a thicker, frothy cold coffee, blend the cooled decoction with cold milk and a few ice cubes.

Coffee decoction: how long is it good for and what can you do with it?

It is best the day you make it. Leftover decoction can be cooled, kept covered in the fridge and used within a day for iced filter coffee or a blended cold coffee, or frozen into coffee ice cubes.

Does decoction lose its taste and aroma if you keep it for long?

Yes. Decoction loses much of its aroma by the next morning, so we brew only what the house will drink. For iced coffee that is less of a worry than for hot kaapi, but it still tastes best fresh.

Can I use a second decoction for iced coffee?

You can pour hot water over the used powder for a second decoction, but it comes out lighter and milder than the first. Over ice it gets thinner still, so use the first, strongest decoction for iced kaapi.

Should I add hot decoction straight to ice?

Better not. Hot decoction melts the ice almost at once and the glass turns watery. Let it cool on the counter, then in the fridge, before it meets the ice.