Making a delicious cup of ice-drip coffee requires attention to many details, such as the selection of ice-drip coffee beans, grinding thickness, powder-to-water ratio, water drop flow rate, storage and quality assurance, etc. So today Front Street will talk about various operational details in this article. 1. Make iced coffee beansCold brew and ice drip are both low-temperature coffee brewing methods. The temperature of the water in contact with the coffee powder will be between 0-7℃. The advantage of low-temperature extraction is that the extraction efficiency is low, which can reduce the release of bitter macromolecules. Therefore, ice-drip coffee is usually less bitter and has a rich sweet and sour flavor.Since ice dripping cannot extract a large amount of aromatic substances in coffee powder with high-temperature water, especially the macromolecular aromatic compounds that are the mainstay of medium-dark roasting are difficult to dissolve in ice water, it is usually made with light to medium-roasted coffee beans with floral and fruity aromas, obvious sourness and sweetness, or fermentation aromas.Among them, single-origin coffee beans with unique flavors will be recommended first. If you like iced coffee with high sweetness, you can use Front Street Xizhao,Front Street Strawberry Candy, Front Street Elto and other beans rich in ripe fruit flavor; but if you prefer sour coffee, you might as well try it fromfront street tomatoes, Front Street Fruit Ding Ding, Front Street Oiran started to buy. Of course, Front Street sometimes puts two coffee beans together in the hope of making ice-drip coffee with a more complex taste. For example, today’s recipe is 20 grams of Front Street strawberry candy + 40 grams.Front Street Red Cherry, the iced coffee produced has the aroma of preserved fruits, sweet orange and roses, and after drinking it, it also has a fresh flavor like lemon and berry.
Front Street recommends that when making ice-drip coffee beans, it is best to choose beans that are within 45 days of the roasting date, because during this period of time, the coffee beans will have a rich aroma, and the extracted coffee will have a more outstanding flavor.2. The importance of flattening coffee powderWhen making ice-drip coffee, we can press the powder properly, but many people don’t understand why ice-drip coffee also needs to be pressed into powder.The reason why ice-drip coffee needs to be pressed is not to compact it firmly, but to allow the coffee powder to receive a more uniform extraction. The specific method is very simple. First, lightly pat the powder and letfilter cartridgeThe coffee powder in the coffee powder is more evenly distributed, and then use a flat-bottomed powder hammer to gently flatten it. Remember to flatten it gently when pressing the powder, rather than compacting it hard like extracting and espresso.If you press the powder too firmly, since ice-drip coffee does not have the pressure to be extracted by a coffee machine, it will easily cause water to accumulate in the powder layer, making it impossible to filter the coffee liquid. Moreover, the filter paper or filter of the ice drop is usually at the bottom, unlike the coffee filter cup which has breathable grooves. Therefore, when the coffee powder is soaked in water, the exhaust effect will also be affected, and uneven extraction will easily occur at this time.We can use ice water to pre-moisten it before officially using ice water for drip filtration! The purpose of using ice water to "pre-soak" is also to make the extraction more uniform. Because by pre-soaking, a "link" can be created between the coffee powder and the coffee powder, so that the dripping ice water can better extract all the coffee powder evenly through the capillary effect.4. Place a piece of circular filter paper on the powder trough.The purpose of laying filter paper is also for more uniform extraction! After we soak the coffee powder, we can lay a piece of filter paper on the coffee powder. This can increase the contact area between the water droplets and the coffee powder and ensure uniform extraction. If there is no filter paper, when water drops fall and touch the coffee powder, a small pit will slowly drip out of the surface of the coffee powder, and the water will flow down the small pit instead of spreading around. Therefore, the coffee powder in the entire powder bottle will not be completely infiltrated, resulting in insufficient extraction. Laying a layer of filter paper will prevent this from happening.5. Find the right coffee grinding thicknessThe grinding degree of Front Street iced drip coffee is generally 80-85% with a Chinese No. 20 standard sieve. We all know that if the coffee is ground too coarsely, the coffee will have a weak flavor; if it is ground too finely, the coffee will be strong and bitter. In the same way, if the coffee powder is too coarse, it will have no flavor, while if the coffee powder is too fine, it will easily cause blockage and prevent normal drainage, which will make the coffee bitter, so it is very important to choose the right grinding degree.This time, Front Street uses refreshing Kenyan cherry tomato coffee beans. The extraction rate is lower at low temperatures. Therefore, Front Street recommends using a finer grinding degree than hand brewing. Here we use China No. 20Standard sieveThe pass rate is 82%. The store's ek43s grinder has a scale of 9.5, and the hand-cranked grinder C40 has a scale of 20 to 22.6. Control water droplet speed and powder-to-liquid ratio The flow rate is the same as that of hand brewing, but the flow rate of ice droplets is calculated in terms of the number of drops per second. The slower the flow rate, the longer the total time required, and over-extraction is prone to occur. Front Street generally uses 7 drops every 10 seconds for extraction, and everyone can adjust the flow rate according to their own preferences. The ratio of powder to liquid is 1:10. Since the ice-drip coffee produced by Front Street is diluted with ice cubes before drinking, a higher concentration is used. If you make it at home, you can use 1:12-1:14 for extraction. Fill the upper pot with a mixture of ice and water, that is, ice and water 1:1, and extract a total of 600g of coffee liquid.7. Drink after refrigerating Front Street usually pours the finished ice-drip coffee into a glass bottle with a sealing rubber ring and puts it in the refrigerator to rest for 12 hours before drinking. The process of pouring coffee into a glass bottle can mix coffee liquid with inconsistent concentrations, and choosing a container with good sealing performance can ensure that it is not contaminated by the outside world. The surface of the refrigerator may seem clean, but in fact there are many microorganisms that are difficult to detect with the naked eye.
Put it in the refrigerator for 12 hours of low-temperature fermentation, which will give the ice-drip coffee an aromatic fermentation aroma, and the original flavor will become richer. Fermentation is very common in life, and uncontrolled fermentation can lead to food spoilage. In a low-temperature environment, this process can be effectively slowed down, and Front Street has also proven that ice-drip coffee made from most coffee beans has the most delicious flavor after being chilled for 12 hours.
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
