How to Use a Coffee Maker for Cold Brew Without Sourness

Cold brew uses water at about 5°C dripped slowly through coffee grounds over several hours. Because hot water never touches the grounds, bitter and astringent compounds stay behind, so the finished cup is neither sour nor astringent and is gentle on the stomach, with a full body and smooth mouthfeel.

Dark-roasted beans work better here, since cold brew is often diluted with ice and light roasts would taste too weak. The slow drip rate and long contact time complete the coffee extraction at a constant low temperature. Keeping the dripper clean and the water cold throughout is the main precaution for a consistent result at home.

Cold brew coffee uses cold water at 5°C, slowly dripped through coffee grounds over several hours of extraction. The resulting coffee liquid has a rich aroma, smooth and rounded mouthfeel, full body, and particularly outstanding flavor expression. Its greatest advantage lies in being neither sour nor astringent and gentle on the stomach, thanks to the choice of dark-roasted coffee beans and the entire cold-water extraction process, which avoids the release of astringent compounds that hot water at high temperatures would extract. This article will provide a complete introduction to the key points of making cold brew coffee, from the principles and characteristics, equipment usage methods, and precautions to the specific production process of the Dutch drip coffee maker, helping coffee enthusiasts make the ultimate hundred-percent-original water-drip coffee at home.

After the coffee grounds are fully saturated with cold water, the extracted coffee liquid has a full aroma, smooth texture, and prominent body that draws admiration; its flavor expression is exceptionally outstanding. By adjusting the water drip rate, extraction is completed through slow cold-water dripping. Under a constant low temperature of 5°C over a long dripping period, the original flavor of the coffee is naturally restored.

The advantage of cold brew coffee is that it is neither sour nor astringent and is gentle on the stomach. When making coffee this way, the beans chosen are usually dark-roasted types, such as Front Street Coffee Mandheling, a common choice. As the saying goes, "light roast is fragrant but sour; dark roast is bitter but strong," so cold brew coffee will not carry sourness. Another consideration for choosing dark-roasted beans is that iced coffee is often diluted with ice cubes after being made, so dark-roasted beans must be used for dripping; otherwise, the concentration will be insufficient.

The reason water-drip coffee has no astringency when drunk lies in the use of cold water. Most other coffee brewing methods use hot water for extraction, and hot water at excessively high temperatures breaks down certain chemical substances in coffee, releasing astringency; water-drip coffee, however, relies entirely on cold-water dripping, with the coffee fully saturated and moistened, producing a smooth coffee that is neither sour nor astringent.

How to Use

Cold Brew Coffee Maker

Cold Brew Coffee Maker

1. First, close the water drip adjustment valve

2. Pour an appropriate amount of cold water into the water container according to the number of servings; you may also add an appropriate amount of ice cubes at the same time to brew iced coffee. The standard water volume for one person is approximately 120CC

3. Wet the cloth filter with water, then place it into the coffee powder cup

4. Pour an appropriate amount of coffee grounds into the coffee powder cup; the standard amount for one person is approximately 10-12g of extra-fine ground coffee

5. Next, place a round filter paper on the center surface of the coffee grounds (No. 6 round filter paper specially designed for water-drip coffee makers). The round filter paper should be positioned at the spot where water droplets from the water container will land

6. Slowly open the water drip adjustment valve to let the water in the water container begin to drip. The water droplets should land on the round filter paper. The standard drip rate is 40-60 drops per minute, and it needs to be readjusted once every 2 hours

7. The water droplets will sequentially penetrate the round filter paper and the coffee grounds, forming coffee liquid that passes through the cloth filter and finally falls into the coffee liquid container. The refreshing, delicious, hundred-percent-original ultimate water-drip coffee is now complete.

Precautions

1. Before and after use, be sure to rinse all glassware and the cloth filter with clean water

2. After use, immediately discard the round filter paper; it must not be reused

3. The cloth on the cloth filter can be reused after being cleaned thoroughly, but if the cloth is found to be damaged or emitting an odor before use, stop using it immediately and replace it with a new one.

Coffee Maker

This device originated in the Netherlands, so it is also called the Dutch iced coffee drip maker. It consists of 3-4 layers of glass containers mounted on a wooden base. Placed in a glass display window at the entrance, it is both spectacular and carries a touch of mystery.

The upper layer of the Dutch iced coffee drip maker is the water container, available in various specifications ranging from 500cc to 3000cc by capacity.

Production Process

Materials

Cold brew drip maker; dark-roasted coffee grounds, mineral water, ice cubes.

Production Steps

1. Grind the specially designated cold brew coffee beans with a grinder at a setting of 2-3.

Cold brew coffee during extraction

Cold brew coffee during extraction

2. Place the filter mesh at the bottom of the extraction bottle.

3. Pour the coffee grounds into the extraction bottle and level the surface of the coffee grounds.

4. Place the extraction bottle above the collection bottle, then place the drip tray above the extraction bottle.

5. Prepare ice cubes and filtered pure water, and pour them into the water reservoir at a 1:1 ratio.

6. Open the control switch and evenly wet the surface of the coffee grounds.

7. Adjust the throttle valve; approximately 40-60 drops per minute is optimal.

8. Once production is complete, it is ready to enjoy.

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