DIY Sweet, Mellow and Super Easy Cold Brew Coffee DIY
Contents:
1. Cold Drip Coffee Maker
2. Cold Drip Brewing Method
3. Cold Drip Coffee Experiment
On a hot summer day, if you want to drink iced coffee, all you need is a simple filter paper and some ice cubes to make cold brew coffee! Isn't it fun? The extracted coffee has a unique flavor that is sweet and full-bodied, with a smooth and rich body, like juice. It's even more enjoyable than drinking fruit juice. Let's try it out together!
Cold Drip Coffee Maker
Previously, to make cold brew coffee, you had to buy a cold brewer and use a container filled with ice water to slowly drip the water onto the filter cup below. After a few hours of brewing, you would get a sweet iced coffee. However, now you don't need to buy a special cold brewer anymore. Recently, there has been a popular and extremely simple method circulating on the internet, using existing pour-over equipment to make cold brew coffee.
Cold Drip Brewing Method
As shown in the main image, in the filter cup filled with coffee grounds, add ice cubes and pour in a little water to moisten the coffee grounds. As the ice slowly melts and drips into the coffee grounds, undergoes filtration, and then drop by drop into the sharing pot, you will have cold brew coffee after about 3 to 5 hours. Since there is no water drip control function like a cold brewer, the speed of ice melting determines the speed of dripping. In an air-conditioned room at 26℃, with 150g of ice, it takes about 3 hours to complete the dripping process. To measure the temperature during extraction, insert a thermometer into the coffee grounds filled with melted ice, and the temperature will be around 10℃. This is because ice typically melts between 0 and 10℃. You can use the same grind size as for pour-over brewing. Since the water used for extracting coffee is cold water, this method is also known as cold brew coffee.
Cold Drip Coffee Experiment
The beans used in this experiment are "Ethiopia Guji Uraga G1 Natural - TOH Champion Batch."
Flavor description: Grape, peach, lychee, chocolate, slight alcoholic aroma, rose, mango sweetness, mellow acidity, juicy and sweet fruity aftertaste.
In terms of coffee-to-water ratio, we tried 1:8 and 1:14. The 1:8 ratio tasted the best, with a sweet and full-bodied flavor. The 1:14 ratio was relatively less intense but still had more sweetness than acidity. Compared to hot pour-over brewing, it was sweeter, less acidic, and had a more mellow and smooth body.
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Experiment 1 (coffee-to-water ratio: 1:8)
20g of coffee grounds
140g of ice cubes
20g of water
Time: 3 hours
Brew 130g of coffee liquid
Taste: Sweet and full-bodied, with notes of grape, peach, lychee, rich alcoholic aroma, rose, full sweetness, and a long fruity aftertaste.
Experiment 2 (coffee-to-water ratio: 1:14)
20g of coffee grounds
250g of ice cubes
30g of water
Time: Overnight, unsure
Brew 250g of coffee liquid
Taste: Grape, lychee, chocolate, slight alcoholic aroma, initially acidic and then sweet, with a chocolatey aftertaste, relatively less intense.
Experiment 3 (coffee-to-water ratio: 1:14)
20g of coffee grounds
240g of ice cubes
40g of water
Time: 1 hour later, drinking while brewing
Taste:
In the beginning, it has an extremely sweet fruit juice sensation, even better than actual fruit juice, with a smooth and rich body.
In the middle, it has a pronounced acidity with sweet peach notes and a floral aroma.
Towards the end, it becomes subtly lychee and grape juice-like, with a lighter body.
As the weather gets hotter, are you starting to think about various interesting ways to enjoy iced coffee? We tried a simplified method of making cold drip coffee based on a technique that is very popular online. This method is also favored by the World Coffee Brewing Champion, Tetsu Kasuya, during the summer. He calls it the “ice extraction method,” which involves ultra-low temperature extraction of coffee grounds. Taking a sip of cold drip coffee in the summer leaves a lasting impression of its delightful sweetness and full body. It's something that will make you keep drinking iced coffee, sip after sip! Give it a try using pour-over equipment and have fun exploring this method!
│Further reading: Understanding the Different Types of Iced Coffee
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