The standard amount of powder for a cup of coffee produced by Front Street is 15 grams of powder, so when sharing coffee brewing, 15 grams of powder is used as the demonstration standard.
However, there are many different amounts of powder used for brewing coffee. According to observations on the front street, the more common ones are 12 grams, 18 grams, and 24 grams that are multiples of 6. Most of these powder amounts are derived from 120ml of coffee liquid for one person. There are also multiples of 5, such as 15 grams, 20 grams, 25 grams, etc. This method is a compromise based on the recommended powder amount of the filter cup, which means that it is suitable for the brewing amount of the filter cup model, and it is also convenient for calculating the proportion of water. There is also a 16-gram brewing method. The advantage of this is that it is more convenient to calculate the water injection in sections with a brewing ratio of 1:15.
What are the effects of different amounts of powder on brewing?I believe that friends who are used to 15 grams of brewing will form a conditioned reflex (the same applies to those who are used to other powder amounts). Pour 15 grams of powder into the No. 01 V60 filter cup, just at 1/2 of the cone height, and fill it with water using a stable flow of water. The powder layer state will have an inexplicable sense of familiarity. It is no exaggeration to say that even without an electronic scale, you can still grasp the powder to water ratio very stably.
Therefore, the first difference is that the performance of the powder layer is different. When the difference in powder amount is small (such as 15, 16 grams), the performance of the powder layer does not change much. If the difference in powder amount is relatively large (such as 15 grams and 20 grams), then the change in the performance of the powder layer is very obvious.The same V60 filter cup No. 01 is used to brew 15 grams and 20 grams of powder respectively. The powder layer of 20 grams will be higher than that of 15 grams, but there is no need to adjust the brewing method and parameters because this is within the range of quantitative changes. If you use the No. 01 filter cup to brew 25 grams, if you still brew it in the same way, there is a high probability that it will overturn. Because the reasonable capacity of this filter cup is 10-20 grams, if the amount of powder is exceeded, the filter cup cannot hold so much water.
Therefore, some adjustments need to be made to ensure that the brew tastes the same as usual. It is unavoidable to pour water in multiple stages when brewing a large amount of powder in a small filter cup. In order to avoid over-extraction caused by soaking for a long time, Front Street recommends that the grinding degree be slightly coarser to reduce the risk of over-extraction. Taking EK43s as an example, when brewing a large amount of powder, Front Street will increase the coarseness by 0.3. Next is the issue of water injection. As the amount of powder increases, the basic surface area of the powder layer also increases accordingly. Therefore, in order to adapt to the rhythm, the water flow also needs to be increased accordingly. In fact, the fault tolerance rate of large powder volume is much higher than that of standard powder volume. It is very tolerant to water flow, circles, etc. I find it difficult because I am not familiar with the process.If you replace it with a matching filter cup, there won't be so much trouble. Major manufacturers have also launched the No. 02 filter cup, which is suitable for large-volume brewing. Take the No. 02 V60 filter cup as an example, which is suitable for 2-4 people and 20-40 grams of powder. There are no hardware restrictions when brewing. But what you need to pay attention to is the judgment of time. Front Street said that the extraction time of a cup of coffee is about 2 minutes. This time is based on the three-stage brewing of 15 grams of powder.
Therefore, when the amount of powder increases, the brewing time will increase. According to the three-stage brewing method, the extraction time of 15 grams of coffee powder is about 2 minutes, the extraction time of 20 grams of coffee powder is about 2 minutes and 20 seconds, and the extraction time of 30 grams of coffee powder is within 3 minutes.
The water injection speed should also be controlled accordingly when the amount of powder changes. When the amount of powder is large, the water flow should be increased appropriately, and when the amount of powder is small, the water flow should be reduced. Therefore, some very narrow mouth brewing kettles are not suitable for brewing large amounts of powder (the advantages of grenade kettles are reflected).
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
