How to Brew Iced Pour-Over Coffee? What's the Ice Ratio and Parameters for Iced Pour-Over?

Iced pour-over coffee, more accurately described as "rapid cooling pour-over," means brewing hot coffee normally and then rapidly cooling the coffee liquid from hot to cold using ice cubes.

Of course, just as watching a barista at a café makes it hard to replicate the exact same flavor at home, the real challenge lies in the parameters. Whatever the extraction method, the essential parameters always include grind size, water temperature, coffee-to-water ratio, and time. If you simply apply hot pour-over parameters to iced pour-over, the final coffee will be very weak and lack flavor.

So the first parameter to adjust is the coffee-to-water ratio. Based on the principle that pour-over coffee starts strong and weakens toward the end, using less water gives a more concentrated coffee liquid that won't become too diluted after the ice goes in. This does create a second problem, though: with less water, the substances that should be extracted in the later stages aren't extracted, and the extraction rate comes up short. That way the concentration is adequate but the flavor is lacking.

At this point, two parameters can be adjusted: grind size and water temperature. A finer grind lets coffee particles release their substances more easily, and a higher water temperature improves extraction efficiency. You can adjust the grind to suit the situation, or adjust the water temperature, or both. FrontStreet Coffee suggests going finer on the grind first, since that also affects another passive parameter, the extended extraction time, which fits our purpose.

The principles are now fairly clear. As for how much to reduce the ratio, how much finer to grind, and how much ice to add, there is no standard answer, but you can refer to FrontStreet Coffee's approach. Given the same coffee beans, you don't have to copy every parameter back home. To make iced pour-over like what you drink in the shop, you only need one "universal formula":

Iced Pour Over = Coffee powder (fine grind) + 10x hot water + 5x ice cubes.

As for filter cones, if you prefer rich, bright fruit acidity, start with a conical cone like the V60. If you prefer rounded, balanced coffee, prioritize a flat-bottom cake cone to enhance the immersion effect. Also, try to choose larger ice cubes, since they won't melt too quickly in hot coffee.

Choosing the Right Coffee Beans

As the saying goes, choosing the right coffee beans is half the battle. For iced pour-over, FrontStreet Coffee tends to prefer light to medium roasts with fruity acidity, prioritizing origins from Ethiopia, Panama, Colombia, and Costa Rica. These coffees are often processed using natural, honey, or anaerobic fermentation methods, and when made into iced coffee they often show excellent aroma while keeping a refreshing mouthfeel.

Today's Demonstration

For today's demonstration, FrontStreet Coffee has selected the recently popular FrontStreet Coffee Alo Hattesa. This bean originates from the Bensa town in Ethiopia and is naturally processed. Whether served hot or cold, it always presents elegant magnolia flower notes, a tropical juice sensation, and a candy-like aftertaste. FrontStreet Coffee's light roast iced pour-over uses the following parameters:

Coffee amount: 15 grams
Water amount: 150 milliliters
Ice cubes: 100 grams
Grind size: EK43s setting 9.5 (85% pass-through rate on a #20 sieve)
Water temperature: 92 degrees Celsius
Filter cone: V60

First, place the ice cubes in the server, then set the filter cone and filter paper in place and pour in the coffee powder. Begin by injecting 30ml of water for a 30-second bloom.

For the second pour, inject 60ml of water in a spiral from the center outward and back to the center. When the water level in the coffee bed is almost finished dripping, start the third pour, injecting 60ml with the same technique. The extraction time is 1 minute 30 seconds to 1 minute 50 seconds.

Then, with a shaking motion, thoroughly mix the ice cubes with the coffee liquid while feeling its temperature with your hand. When it is sufficiently cold, you can begin to enjoy it.

This brewing method produces FrontStreet Coffee's natural Alo, which opens with mouthwatering sweet-and-sour notes reminiscent of yellow peach, sweet orange, preserved fruit, and dried mango, with an overall leaning toward yellow drupe fruit. Thanks to the shaking motion, the coffee has not only rich fruit acidity but also a refreshing sweetness. Under the cooling effect of the ice cubes, it drinks like a glass of refreshing grape juice.

FrontStreet Coffee Recommendation

Iced pour-over is at its best with lightly roasted, fruit-forward coffees, and Ethiopian beans are the classic place to begin. FrontStreet's Gutingding cooperative coffee fits the bill: its washed processing gives a clean cup of jasmine florals and bright citrus and lemon acidity, and the green-tea-like sweetness stays fresh and vivid once the ice brings the temperature down.

If you want the tropical, candied style that the Alo above shows, FrontStreet's Ethiopian Huakui is a natural match. Its tropical aromatics are extremely pronounced, with strawberry, passion fruit, and jackfruit on the nose, plenty of sweetness, and almost no bitterness, so even a heavily iced pour-over keeps a smooth, juice-like body.