For more specialty coffee knowledge, please pay attention to: Frontstreet Coffee
When FrontStreet Coffee searched for information, they found that the concept of cold brew coffee was proposed by Toddy Simpson, a student majoring in chemical industry at Cornell University in the United States. After drinking ancient Peruvian iced coffee again, he invented a tool for making cold brew coffee and named it Todd. Later, this technology was introduced by Starbucks to make summer ice drinks.
Cold brew coffee, also known as Cold Brew Coffee in English, is made by soaking ground coffee beans in cold water for at least 12 hours, and then extracting and filtering them with professional equipment. If you want more body, you can extend the time to 24-48 hours. Generally speaking, the process of extracting coffee at low temperature is called cold extraction. Low temperature and long extraction time are two characteristics of cold brew coffee.
Cold brew coffee extraction principle
Cold brew coffee is produced by mixing coffee powder and ice water in a certain proportion and then slowly extracting it. The coffee produced by the cold extraction process has lower acidity and astringency. The low temperature conditions and long-term contact with the coffee powder make it possible for only small molecule flavor substances to be extracted, such as floral and fruity aromas. Those larger molecule flavor substances, such as smoky flavor, are difficult to extract.
What are the flavor characteristics of cold brew coffee?
Low-temperature extraction and long extraction time are the two major characteristics of cold-extracted coffee, and they are also the two main differences between cold-extracted coffee and high-temperature extracted coffee. High-temperature extracted coffee is extracted from coffee beans through hot water, the temperature is between 82-95°C, and the time generally does not exceed 3 minutes. Cold brew coffee itself can fully reflect the subtle taste characteristics of coffee. Due to the mild acidity, sweet taste, bright taste and soft taste of coffee, it shows the flavor characteristics of specialty coffee production areas.
Cold brew water to powder ratio
FrontStreet Coffee believes that the water-to-powder ratio suitable for cold brewing can be about 1:10 to 1:16. You can adjust it depending on your personal preferences. The water-to-powder ratio that FrontStreet Coffee generally uses is 1:15, so that the taste is just right. If you like a stronger water-to-powder ratio, you can also try a 1:10 water-to-powder ratio.
Cold Brew Grind
The finer the coffee powder, the more substances the water can extract in the same time, but the finer the grind, the more likely it is that the coffee will be over-extracted during the extraction process. FrontStreet Coffee believes that because it is extracted at low temperature and for a long time, the grinding degree is recommended to be coarser than that of Pour over(V60) coffee beans.
【FrontStreet Coffee Yirgacheffe dings】
Yirgacheffe Dinguo
Country: Ethiopia
Production area: Yirgacheffe Gedeo Zone
Altitude: 1900-2300m
Variety: Native species (Heirloom)
Treatment method: Washing grade: G1
[How to make FrontStreet Coffee]
Amount of powder: 20 grams
Water to powder ratio: 1:12
Grinding degree: Coarse grinding (slightly coarser than normal hand grinding to avoid over-extraction)
Soaking time: 8 to 10 hours
①. First grind the coffee powder and pour it into the jar, then add 240ml of water.
②Put it in the refrigerator for extraction for 13 hours, allowing the coffee powder to fully contact with the cold water.
③. Use filter cloth or filter paper to filter out the coffee liquid.
[FrontStreet Coffee flavor description]
Floral, citrus, berry. After being kept in the refrigerator for 5 hours, the berry aroma became more prominent, with a refreshing citrus, sweet and clean taste.
[Advantages and Disadvantages of Cold Brew Coffee]
Advantages: FrontStreet Coffee believes that cold brewing method amplifies the flavor and aroma of coffee and reduces acidity. The colder it is, the better it tastes. Without hot water brewing, low-temperature ice water will not extract impurities and bitterness from the coffee beans, so the taste is clean and pure, fresh, slightly sweet and smooth.
Disadvantages: FrontStreet Coffee believes that due to the long contact time between water and coffee powder, the strongest caffeine is suitable for drinking when you need to stay awake most. As a rough calculation, the caffeine content in a cup of cold brew coffee (200ml/20g beans) is about 200mg;
Does cold brew coffee turn sour? yes. In hot brewing, the oils and acids in the coffee beans degrade and oxidize faster than in cold water, which increases the acidity and bitterness of the coffee. The cold temperatures and long brewing times of the cold brew process capture more of the sweet compounds that are soluble in cold water, without the oils and acids.
You can now buy the above coffee beans online at the Taobao store “FrontStreet Coffee” (前街咖啡). FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou, China, and its Guangzhou retail shop sells coffee beans only. The shop carries dozens of coffee beans from different origins around the world, including carefully selected single-origin beans for V60 pour-over and espresso. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers.
The FrontStreet 2013 Yunnan coffee beans sold in the store come from the Typica variety grown at FrontStreet Coffee’s own plantation in Yunnan. The name comes from the year the brand and the plantation were founded. You can buy these beans from China’s Yunnan origin at the Guangzhou shop and at FrontStreet’s Taobao store.
FrontStreet coffee beans are freshly roasted within 5 days and deliver consistently excellent quality and great value. Orders placed before 17:00 are shipped the same day, and most areas within Guangdong Province receive them the next day.
FrontStreet Coffee Taobao store: https://qianjiecoffee.taobao.com
Or search for “前街咖啡” (FrontStreet Coffee) on Taobao
Important Notice: FrontStreet Coffee has moved to a new address: 315, Donghua East Road, Guangzhou (coffee beans only)
Tel: 020 38364473
