How to use a coffee pot for iced pour-over dilution
Two ways to dilute iced pour-over were tested with the same brewing parameters on Costa Rica's Huge Rock estate beans. Adding ice means pouring hot, concentrated coffee straight onto ice cubes so they melt and dilute it. Pouring over ice means running the liquid over ice in a large-hole filter cup, letting it drip into the pot, and repeating until the target strength is reached.
Front Street ran both groups and compared flavor expression, mouthfeel layers and operational stability. Iced pour-over favors a refreshing cup, so beans with bright fruit notes, such as the blueberry gummy profile used here, were chosen. The comparison covers the principle, the step-by-step procedure and the results, so the method can be repeated at home.
On a scorching summer day, iced coffee naturally becomes a hot topic among coffee lovers. Some coffee friends have raised the question: for iced pour-over coffee, is it better to dilute it by adding ice directly, or is it superior to let the coffee liquid flow over ice for dilution? To this end, Front Street specially conducted a round of comparative experiments, using Costa Rica's huge rock estate coffee beans, and with the same brewing parameters, separately made an added-ice group and an over-ice group, conducting a comprehensive comparison from flavor expression and mouthfeel layers to operational stability. This article will break down in detail the principles, operating procedures, and experimental results of the two dilution methods, helping you make iced pour-over coffee at home that suits your own taste.
Article Guide
In the height of summer, iced coffee is bound to be an unavoidable discussion topic among coffee friends. A while ago, a coffee friend asked: "For iced pour-over coffee, is it better to dilute it by adding ice, or is it better to dilute it by letting the coffee liquid pass over ice?" To answer this question, Front Street decided to continue the iced pour-over coffee series of experiments and reveal through actual comparison which dilution method can bring a more satisfying iced pour-over coffee experience~
What is dilution by adding ice?
This is the most common way to make iced pour-over coffee. First, use a higher water temperature to extract a coffee liquid with a relatively high concentration, then pour the coffee liquid directly into ice cubes, using the melting of the ice cubes to achieve the dual effects of rapid cooling and dilution.
What is dilution by passing over ice?
Place an appropriate amount of ice cubes into a large-hole filter cup, pour the high-concentration coffee liquid extracted at high temperature over the ice cubes, and the coffee liquid rapidly drips into the sharing pot while cooling and diluting. Repeat this operation, allowing the coffee liquid to briefly contact the ice cubes and then separate, until it is diluted to the ideal concentration.
Experiment Mini-Theater
For this comparative experiment, Front Street selected Costa Rica's huge rock estate coffee beans, with a flavor like blueberry gummies. Iced pour-over emphasizes a refreshing experience, so when choosing beans, priority was given to varieties that can present this characteristic. If you prefer iced coffee with a prominent juicy feel, you can buy Front Street Kenya Little Tomato or Front Street Blackberry; if you like coffee with a fuller sweetness, then Front Street Strawberry Candy and Front Street Sidra are recommended.
Brewing parameters: use a V60#01 filter cup, grind size based on an 80% passing rate through a 0.85mm sieve (roughly equivalent to the coarseness of fine granulated sugar), use three-stage pouring, water temperature 90°C, coffee powder amount 15g, powder-to-water ratio 1:10. Since the focus of this experiment is comparing the effects of the two dilution methods on flavor, both groups used 100g of ice cubes.
Use the same method to brew a high-concentration coffee liquid: first bloom with 30g of water for 30 seconds, pause when the second pour reaches 90g, wait until the liquid level drops to two-thirds of the coffee bed, then begin the third pour, pouring to 150g, with a total extraction time of 1 minute 30 seconds. At this point, the total weight of the coffee liquid in the pot is 125g.
| Added-ice group: pour the extracted coffee liquid into 100g of ice cubes, and stir with a stirrer for 1 minute.
| Over-ice group: place 100g of ice cubes in a large-hole filter cup, and set it above the sharing pot. Repeatedly pass the extracted coffee liquid over the ice for 1 minute.
Flavor comparison after dilution
Flavor of the coffee after dilution in the added-ice group: on entry, it presents the sweet aroma of blueberry gummies, accompanied by citrus-like acidity, rose floral aroma, and a fermented feel, with a clean and refreshing mouthfeel. After the ice cubes completely melt, the floral aroma and fermented feel weaken somewhat. Although the overall flavor is not as vivid as at first, the sweet and sour sensation is still retained.
Flavor of the coffee after dilution in the over-ice group: the sweet fragrance like blueberry gummies is prominent, with berry-like acidity, rose floral aroma, and a fermented feel, and the mouthfeel is smooth and full, with the sweetness especially obvious. Because there are no ice cubes continuously diluting it afterward, the flavor remains consistent from beginning to end.
So, which is better to drink: dilution by adding ice or dilution by passing over ice?
Each of the two methods has its advantages and disadvantages. The advantage of the added-ice group is that it is more convenient to operate and can retain more delicate and light aromas, making it more suitable for expressing the clean and refreshing sweet-and-sour flavor of iced coffee, but the disadvantage is that as the ice cubes continue to melt, the flavor gradually fades.
The advantage of the over-ice group is stable flavor, and it can show a more prominent sweetness. However, this operation has higher requirements for the hardness and quality of the ice cubes. Inconsistent melting speeds of the ice cubes will lead to decreased consistency in the final product, which not only tests the quality of the ice cubes but also greatly tests coffee friends' quality-control ability.
The above content is compiled by CoffeeHunters, a coffee news website.
