Introduction:Want to quickly enjoy a refreshing yet flavorful iced pour-over coffee in the sweltering summer? This article dives deep into the universal coffee-to-water-to-ice ratio and grind adjustment techniques for iced pour-over, guiding you step-by-step through methods from the three-pour technique to Tetsu Kasuya’s one-pour simplified approach to master the key tricks of iced pour-over. Using Tanzania Kilimanjaro and Panama Finca Abril Caturra as examples, we provide detailed parameters and practical steps. Whether you’re a beginner or an advanced brewer, you’ll find your own perfect summer iced coffee solution.

During the peak of summer, a refreshing iced pour-over coffee not only instantly wakes you up but is also an excellent way to escape the heat. Compared to time-consuming cold brew and ice drip, iced pour-over is not only quick to make but also requires no complicated equipment, making it the go-to summer choice for many coffee lovers. This article will start with the classic iced pour-over universal formula, breaking down the coffee-to-water ratio, amount of ice, grind size, and pouring techniques in detail. With Tanzania Kilimanjaro as an example, we’ll walk you through the full iced pour-over process. We’ll also introduce Tetsu Kasuya’s “one-pour iced pour-over,” which uses minimal steps along with the Mugen Infinity Cross Filter to help you easily brew a layered, sweet-aftertaste-rich iced coffee.

As temperatures soar, many prefer to stay home rather than venture out in the scorching sun for coffee. But even if you’re not going anywhere, how can you quickly enjoy a cool, smooth coffee if you don’t want to invest in expensive ice drip equipment or wait around for a long cold brew process?

Among the many summer coffee beverages, besides the classic iced americano, cold brew, and ice drip, iced pour-over has gradually risen to popularity in recent years. This type of coffee typically features soft acidity and clear sweetness. Coupled with the cooling effect of ice, it can both invigorate the mind and soothe the summer heat—truly a summer lifesaver.

To brew a great-tasting iced pour-over, the key lies in precisely controlling the extraction yield and concentration. Generally, we can achieve the ideal balance by adjusting grind size, water temperature, coffee-to-water ratio, and pouring technique. If you already have a favorite coffee bean, you don’t necessarily need to copy a café’s parameters exactly. Mastering a simple “universal formula” is enough to get you started with ease.

The iced pour-over universal formula is: coffee grounds (recommended fine grind) + 10 times hot water + 5 times ice. Compared to regular hot pour-over, the biggest difference in iced pour-over is the introduction of ice as a variable. To maintain the final brew’s richness and flavor integrity, we replace part of the hot water with ice. Due to the characteristic “strong start, weaker finish” extraction in pour-over, the less water used, the richer the brew, so adding ice later won’t overly dilute the intended flavors.

Based on multiple tests, when the ratio of coffee grounds to hot water is maintained at 1:10, the resulting iced coffee concentration performs best. Then add an additional 5 times the coffee weight in ice. After dilution and cooling, it still delivers a vivid flavor profile. For a single serving using 15 grams of coffee, 10 times the water is 150 grams, and 5 times the ice is 75 grams. For a double serving with 20 grams of coffee, it’s recommended to use 200 grams of water and 100 grams of ice.

Note that because the amount of hot water is reduced, the overall extraction time will also be relatively shorter—usually shrinking from the usual 2 minutes to about 1 minute and 20 seconds. This may result in later-stage flavor compounds not being fully released, leading to under-extraction and a thin flavor profile. Therefore, it’s recommended to slightly adjust the grind finer to extend the water-coffee contact time, ensuring that flavor compounds are adequately extracted.

As for the degree of grind adjustment, it’s suggested to go just a bit finer than your usual hot pour-over. For example, if you’re using an EK43s grinder and usually set it to 10 for hot pour-over, then for iced pour-over you can adjust to 9–9.5. If using a hand grinder like the C40, and your hot pour-over is at 24 clicks, for iced pour-over you can go to 22 clicks.

Taking a medium-light roasted Tanzania Kilimanjaro as an example, the recommended parameters are: 15 grams of coffee, 10 times hot water (150g), 5 times ice (75g), water temperature controlled at 93°C, grind size recommended at EK43s setting 9 (approximately 85% passing rate through a #20 sieve), paired with a Hario V60 filter.

The operation follows the classic three-pour method. First, place the ice in the server (adding ice before or after brewing doesn’t significantly affect flavor). Then add 15 grams of coffee grounds. The first step involves pouring 30 grams of water in a slow, circular motion for the bloom, lasting about 30 seconds. The second pour uses the same method to add 60 grams of water. When the water in the filter begins to run low, pour the remaining 60 grams of hot water. The overall brewing time is recommended to be between 1 minute 50 seconds and 2 minutes.

After brewing, gently shake the server to help the ice melt faster and evenly cool the coffee. It’s now ready to enjoy. This recipe for Kilimanjaro iced pour-over results in a refreshing taste, bright acidity, often with notes of green grapes, berries, nuts, and a hint of floral, perfect for those who enjoy a clean, fresh cup.

If you find the traditional three-pour method a bit too involved, try Tetsu Kasuya’s “one-pour iced pour-over”—minimal effort without sacrificing flavor.

This method recommends using a slower-flowing filter, such as the Mugen Infinity Cross Filter, Kalita Wave, Kono Filter, or flat-bottom filter. This example uses the Mugen Infinity Cross Filter, with 20 grams of coffee, a total of 150 grams of water, and 80 grams of ice pre-added to the bottom server.

The coffee beans recommended are Panama Finca Abril’s natural-processed Caturra. The coffee-to-water-to-ice ratio is 20g + 150g + 80g, water temperature also at 93°C, and grind size recommended at EK43s setting 7 (about 18–19 clicks on the C40 hand grinder).

The operation is very simple: add all the coffee grounds to the filter, then quickly pour 150 grams of hot water using a strong flow, keeping the pour time within 10 seconds. Next, use a small spoon to gently stir about 10 circles along the inner wall of the filter in the same direction. Then wait for the coffee to slowly drip through. The total brew time is about 1 minute and 43 seconds.

After brewing, remove the filter and gently shake the server to promote ice melting and coffee homogenization. Then pour into an ice-filled cup for drinking. If you feel the strength is too high, you can also add 1–2 more ice cubes according to personal preference.

This method yields an iced pour-over with a round, full-bodied mouthfeel, soft acidity, and a long-lasting aftertaste. It often carries complex aromas of cinnamon, liquor chocolate, peach, and Darjeeling tea, making it highly suitable for those who prefer a smooth, mellow flavor.

The above content is compiled by CoffeeHunters, a coffee news website.