Introduction:Cold drip coffee, with its low-temperature slow extraction, reduces bitterness and amplifies aroma, making it an excellent refreshing choice for summer. This article delves into how to select the fruity and distinctive Yirgacheffe Guddina variety to make cold drip, and details practical parameters such as grind size, coffee-to-water ratio, drip rate, and steeping time used by a certain café, guiding you through every step of recreating professional-level cold drip at home.

Cold drip coffee is a brewing method where ice water slowly permeates through a bed of coffee grounds under constant temperature and low pressure to extract flavors. Thanks to the lower temperature of the ice water, it effectively suppresses the release of bitter substances while extending the extraction time to enrich the aroma, resulting in a brew that is often full-bodied yet free of harsh bitterness. When paired with distinctly flavored coffee beans featuring fruity notes and moderate fermentation character, and served chilled, it is especially enjoyable on hot summer days.

Selecting the right coffee beans is key. For those who prefer intense fruity aromas, varieties with pronounced berry notes can be considered; if you favor a clean, refreshing taste with delicate layers, washed-process beans are the top choice, typically offering bright and vibrant acidity. Among them, high-grade Yirgacheffe Guddina is an excellent example — when brewed as a cold drip, its acidity presents a texture akin to fresh juice, accompanied by the bright aromas of cherry tomatoes and citrus, making it highly suitable for summer enjoyment.

In terms of grind setting, because the lower temperature of ice water reduces extraction efficiency, it’s recommended to grind the coffee slightly finer than usual to compensate for the loss in extraction yield. Taking Yirgacheffe Guddina as an example, a certain café’s practical approach is to use a grind that allows about 85% of the particles to pass through a Chinese No. 20 standard sieve — roughly equivalent to setting an ek-43s grinder to level 9, which is similar to the grind size used for typical iced pour over.

Before making cold drip coffee, it’s important to clarify several key parameters: it’s recommended to set the coffee-to-water ratio at 1:10, meaning 60 grams of coffee grounds yield 600 grams of coffee liquid. The ice-to-water mix ratio is advised to be 1:1, and the dripping speed should be controlled at around 7 drops per 10 seconds, with the entire filtration process usually taking 6 to 8 hours. Generally, common cold drip coffee ratios range from 1:10 to 1:12, and you can adjust the strength to your liking.

During actual operation, start by placing a round filter paper at the bottom of the middle chamber and gently wetting it with water; this step helps stabilize the coffee bed and prevent leakage. Next, add the ground coffee into the middle chamber and spread it out evenly, which is an important foundation to ensure uniform extraction. It’s also recommended to cover the coffee layer with another round filter paper on top to prevent the water droplets from directly impacting and causing the coffee bed to loosen or sink.

Before officially starting the drip, it’s advisable to pre-wet the coffee layer with cold water. This not only shortens the subsequent extraction time but also helps avoid uneven extraction issues that may arise from the coffee bed not being fully saturated in the initial phase.

After placing the coffee-filled chamber on the stand, you can begin pouring the ice water mixture, typically with a 50-50 ratio of ice to water. Then adjust the valve to ensure the water drips at a stable rate of about 7 drops per 10 seconds, and pay attention to aligning the dripping position with the coffee liquid outlet to maintain stable extraction pressure and flow rate.

The entire dripping process takes approximately 6 to 8 hours. Once enough coffee liquid has been extracted, pour the collected liquid from the lower chamber into a sealable glass container. It’s recommended to place it in the refrigerator for further fermentation for at least 12 hours; usually, after an overnight rest, it’s ready to enjoy, allowing the flavors to become smoother and more layered.

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