Japanese-Style Iced Pour-Over Coffee Brewing Tutorial—How to Make Iced Pour-Over Coffee

The recent heat has been brutal—the kind that could melt you in minutes. In weather like this, anyone still willing to meet you at a coffee shop is a friend for life! But hot weather is no reason to give up coffee. So if you don't want to go out, can't justify an ice-drip tower, and don't want to wait hours for cold brew, is there still a fast way to get a refreshing, delicious iced coffee?

Summer's Most Popular Iced Coffee

Among the top iced drinks on cafe menus in summer—besides the perennials like iced Americano, cold brew, and ice drip—iced pour-over is easily one of the most popular. It is crisp and refreshing with soft acidity and clear sweetness, and the ice makes it thirst-quenching in a way no hot-brewed-then-chilled coffee can match. A perfect summer treat.

The Universal Formula for Iced Pour-Over

Once people get into pour-over, they learn that a great cup is about balancing extraction yield and concentration—usually by tuning grind size, water temperature, ratio, pouring technique, and equipment together.

But with the same beans at home, you don't need to re-derive every parameter. To make iced pour-over that tastes like the shop's version, you only need one "universal formula":

Iced pour-over = coffee grounds (fine grind) + 10 parts hot water + 5 parts ice.

The Science Behind the Formula

The ice is what separates iced pour-over from its hot counterpart. To make sure the finished cup is strong enough, flavorful enough, and cold enough, we replace part of the hot water with ice. Pour-over extracts its strongest flavors early and its weakest late, so the less water you pour, the more concentrated the brew—and the less it suffers when it hits the ice.

FrontStreet Coffee has tested iced methods across many beans and found that a coffee-to-hot-water ratio of 1:10 produces the best concentration; then adding ice equal to five times the coffee dose leaves the diluted, chilled brew still full of flavor. That is the formula above. For a single serving of 15 grams of coffee, that means 150 grams of hot water and 75 grams of ice. For two people at 20 grams, use 200 grams of hot water and 100 grams of ice.

One caveat: with less hot water, the whole extraction gets shorter—total time often shrinks from around 2 minutes to 1 minute 20 seconds. That leaves the later flavor compounds unextracted, and the cup risks tasting under-extracted: strong enough, but hollow. To rebalance, grind finer, which stretches the extraction time back out.

Grind size is hard to describe in words, and a large deviation spells extraction trouble. FrontStreet Coffee's advice: simply set your grinder slightly finer than your usual hot-brew setting.

For example, on an EK43s, if a coffee brews hot at setting 10, brew it iced at 9 to 9.5. On a C40 hand grinder, a bean that works hot at 24 drops to about 22 for iced brewing.

Tanzania Kilimanjaro Recipe

Coffee: Tanzania · Kilimanjaro, medium-light roast

Coffee grounds: 15 grams

Hot water (10x): 150 grams

Ice (5x): 75 grams

Water temperature: 93°C

Grind size: EK43s setting 9 (85% pass-through on a #20 sieve)

Dripper: Hario V60

Technique: three-stage pour

Before you start, fill the server with ice (whether it goes in before or after barely changes the flavor) and add 15 grams of coffee. Pour 30 grams of water in small circles from the center outward for a 30-second bloom. For the second pour, use the same motion to add 60 grams. When the dripper has nearly finished dripping, pour the last 60 grams of hot water. Total extraction time should land between 1 minute 50 seconds and 2 minutes.

Finally, swirl the server to speed the melting of the ice while mixing and chilling the coffee—and drink. This Kilimanjaro iced pour-over is crisp and bright, with flavors of green grape, berries, and nuts and a faint floral lift.

The One-Pour Method

If even that sounds like too much work, there is a more forgiving option: the "one-pour iced pour-over" developed by Tetsu Kasuya.

Start with a slower-flowing dripper—a Kalita wave, Kono, Mugen, or other flat-bottom dripper. FrontStreet Coffee demos with the Mugen Cross Star. You will also need a small spoon for stirring. Dose 20 grams of coffee, prepare 150 grams of hot water, and place 80 grams of ice in the server beforehand.

Coffee: Panama · Elida Estate · Natural Caturra

Coffee + water + ice: 20g + 150g + 80g

Water temperature: 93°C

Dripper: Mugen Cross Star

Grind size: EK43s setting 7 (about 18-19 on a C40)

The method is simple. Add the coffee, then pour all 150 grams of hot water in one big flow, keeping the pour to about 10 seconds. Stir with the spoon in one direction along the dripper wall, about 10 turns, then let the coffee drain slowly into the server. The whole extraction takes about 1 minute 43 seconds.

Remove the dripper and swirl the server hard until all the ice has melted into the coffee, then pour over fresh ice to serve (add 1-2 cubes more if you like it less concentrated).

The one-pour method yields an iced pour-over with a rounded mouthfeel, gentle acidity, and a firm sweet finish, with aromas of cinnamon, liqueur chocolate, peach, and Darjeeling tea.

FrontStreet Coffee Recommendation

Once you are hooked on iced coffee, cold brew is the natural next step—and FrontStreet Coffee's Strawberry Candy blend is a favorite for it. Combining Panama Geisha with Costa Rican honey-processed coffee, one side lending rose and orange, the other grape, dried blueberry, and strawberry-soft-candy sweetness, it makes a cold brew that is sweet-tart, lively, and—if you let it rest and settle—almost wine-like. The recipe is simple: grind 30g to fine-sugar texture (EK43s setting 9, or 24 clicks on a C40), stir into 360g of room-temperature water at a 1:12 ratio, cover, and refrigerate for 8 hours. Strain through filter paper, seal, and return the brew to the fridge for 3 more hours to mature. Expect grape juice, rose, sweet orange, and fruit-wine notes in the glass.

For an even more floral cold brew, the FrontStreet Natural Flower Queen shines: cold extraction plays up its jasmine, creamy strawberry, dried mango, guava, and black tea notes while taming any woody roast flavors. Cold brewing rewards light-to-medium roasts precisely because low temperatures emphasize delicate fruit and floral molecules first—so keep those brighter beans coming all summer.

FrontStreet Coffee is a roastery based in Guangzhou. The shop is small but the bean selection is broad, covering both famous names and rare finds, and online ordering is available as well.