How to Make Japanese Iced Coffee

What you need

• Burr grinder
• Kettle
• Pour-over dripper
• Paper filter
• Carafe or decanter
• Kitchen scale
• Timer
• Pint glass or serving glass

Method

1. Grind 30 g of whole coffee beans to a medium-fine coarseness, similar to the texture of kosher salt

   Expert tipConsistency matters more than hitting an exact setting; adjust slightly coarser if the brew drains too slowly or stalls before the 3-minute mark

2. Heat water to 96°C (205°F)

3. Place the paper filter in the dripper and rinse it thoroughly with hot water to remove any paper taste, then drain as fully as possible

4. Add 250 g of ice to the decanter, then seat the rinsed dripper on top

   To avoid weighing the ice each time, find the average weight of one of your ice cubes and count out enough to reach 250 g; plus or minus 5 g will not significantly affect the result

5. Add the 30 g of coffee grounds to the filter and shake the dripper gently to level the bed

6. 45 seconds

   Bloom the grounds by pouring 60 g of hot water evenly over the coffee bed, then wait 45 seconds before continuing

   60 g is twice the weight of the coffee, following a 2:1 water-to-coffee bloom ratio

   Expert tipThe 45-second bloom is intentionally longer than a standard pour-over bloom; the extra rest time is said to yield a crisper flavor in the finished cup

7. Under 3 minutes

   Slowly and steadily pour the remaining hot water until the cumulative water poured reaches 275 g, completing the brew in under 3 minutes

   Pour slowly and deliberately; the ice below the dripper chills and partially dilutes the coffee as it drips through

8. Swirl the decanter gently to equalize the temperature of the brewed coffee with any remaining ice, then pour into a glass and serve

   A pint glass works well; additional ice in the serving glass is optional

Why this works

Brewing hot water directly onto ice simultaneously extracts the coffee and flash-chills it, locking in volatile aromatic compounds that would dissipate if hot coffee were left to cool slowly. Pre-loading the decanter with a measured amount of ice accounts for dilution upfront, so the finished drink is neither watery nor over-concentrated. The longer 45-second bloom allows more thorough degassing of the grounds, contributing to the cleaner, crisper flavor. This positions Japanese iced coffee between cold brew — low acidity, slow, less nuanced — and standard iced coffee — fast, but prone to flat or burnt flavors that require cream and sugar to mask.

Where beginners go wrong

1. 1

   Coffee tastes too diluted or watery

   Verify you used exactly 250 g of ice and no more than 275 g of brew water; excess ice melts into unwanted dilution, and over-pouring water compounds it

2. 2

   Brew drains too slowly and runs past 3 minutes

   The grind is likely too fine; coarsen it by a small increment and test again until the brew completes within the target window

3. 3

   Papery or off flavors in the cup

   Rinse the paper filter more thoroughly before adding grounds, and make sure to discard any rinse water that collects in the decanter before adding the ice

4. 4

   All the ice melts before the brew finishes

   Start with the full 250 g of ice and pour the water as slowly as possible; pouring quickly delivers heat faster than the ice can absorb it

What you should taste

A well-made Japanese iced coffee is clean, crisp, and refreshing. Light roasts highlight fruit and citrus notes with bright acidity; medium roasts contribute earthy, chocolatey character. The cup is noticeably less diluted and more nuanced than iced coffee made by simply chilling pre-brewed coffee.

FAQ