Many friends are very comfortable brewing single-serve coffee, and can brew a pot of delicious coffee very easily. However, when the amount of powder is doubled and coffee is brewed for multiple people, the performance is not so outstanding! After one operation, the coffee brewed not only does not have as rich layering as before, but also has some negative flavors such as bitterness, astringency, miscellaneous, and over-extraction.Recently, many friends have reported to Xiangjie that such a situation has occurred! So today Front Street is here to share with you why the coffee brewed after increasing the amount of powder is not as delicious. And how do we brew a pot of coffee with a large amount of coffee for multiple people.Why does the coffee brewed after increasing the amount of powder not taste as good?In daily brewing, the amount of powder we brew will be relatively fixed. Generally, because it is a single serving of coffee, the amount of powder will basically not exceed 20g. Over time, we gradually mastered the secret of brewing "small powder coffee". How much water should be injected at what time, how high the water flow rate should be, when to stop water injection, or when to continue water injection... In short, all the details can be said to be very well grasped.But what we need to know is that the brewing method of small-powder coffee is not suitable for brewing large-powder coffee. Because coffee for multiple people usually uses 30~40gcoffee powder, compared with a single serving of coffee, the amount of powder is about twice as much.The increase in the amount of powder will also increase the amount of water. Therefore, the amount of water poured into coffee for multiple people will be about twice as much as that for a single person. And this leads to the fact that if we want to brew a pot of coffee for multiple people, we need to slightly change the brewing idea.Because the increase in the amount of coffee powder and water will extend the extraction time! When we use more coffee powder, the powder layer will be thicker and the hot water will take longer to penetrate. If the water injection method remains unchanged, the more water is injected, the longer it will take to complete the target amount of water. With the superposition of the two, the extraction time will be greatly increased.For example, when Front Street brews a 15g pot of coffee for a single person, the extraction time will be about 2 minutes. When Front Street uses the same method to brew a 30g pot of coffee for multiple people, the brewing time will be 2 minutes and 50 seconds, or even longer.When other parameters remain unchanged, the increase of time means that more substances in the coffee will be dissolved, whether the substances are good or bad. So if we don’t want all the negative substances in coffee to dissolve out, causing the coffee to have negative flavors such as bitterness, miscellaneousness, and astringency, then Front Street would recommend improving it by adjusting parameters, changing utensils, or brewing methods!1. Adjust the amount of water injectionFirst, we can shorten the brewing time by adjusting the amount of water injected. The size of the water flow refers to the speed at which we inject water. For example, does it take 20 seconds or 30 seconds to inject 100ml of water? The shorter the time it takes to inject the target amount of water, the greater the water flow, and vice versa.The size of the water flow affects the extraction and draining time. When the water flow is larger, the extraction time will be shorter.(If the fine powder is not blocked); When the water flow during water injection is smaller, the extraction time will be longer. This is mainly affected by water pressure and water injection time.So, if we want to shorten the extraction time, we can do it by increasing the water flow during brewing. But what! When the amount of powder is relatively large, we also need to replace the filter cup with the 02 model large filter cup to be able to use large water flow for brewing.
2. Replace the filter cupThe main reason why the 01 model filter cup is suitable for single-serve coffee brewing is that it cannot hold too much hot water at one time. So when we use the 01 model filter cup to brew a large amount of coffee, the hot water always needs to be injected in several sections, which results in the extraction time being extended and some bad substances in the coffee are also dissolved.Therefore, if we want to simply brew a pot of coffee with a large amount of powder, then replacing the filter cup with the 02 model large filter cup will be a good choice. But as mentioned before, just changing to a large filter cup is not enough. We need to match the appropriate water filling method to make a cup of delicious coffee. The specific method is very simple. Let’s give a brief demonstration on Front Street.The coffee beans used in this Front Street demonstration are the Front Street Esai Oiran in the Front Street bean list. The extraction parameters are: 30g of powder, powder to water ratio 1:15, water temperature 92°C, grinding to 80% sieving rate of No. 20 mesh, fine sugar grinding, brewing method is three-stage, and the filter cup used is V60 "02".First, still use twice the amount of water as the powder to steam for 30 seconds. However, as the amount of powder increases, the powder bed becomes thicker, and it is more difficult for the hot water to fully wet the coffee powder. This will prevent the coffee powder from being fully exhausted, and the extraction will be uneven.If we want all the coffee powder to be evenly moistened and fully exhausted, then during steaming, we need to concentrate the hot water in the center so that the thickest part of the powder bed can get the most hot water. The specific method is very simple. When we inject water, we first stay in the thickest center of the powder bed for a while, and then circle outwards.When the steaming is over, we come to our official extraction stage. In this stage, the amount of water we need to inject is 195ml. As mentioned in the previous street, in order to reduce the extraction time, from this stage onwards, we will use large water flow to inject. The water injection rate is about 10ml/s, and the circle range is relatively large. It takes about 20 seconds to complete the injection of hot water in this section.When the hot water has almost penetrated, we can use the same water flow to inject the remaining 195ml of hot water in small circles. Then we only need to wait for the coffee in the filter cup to drip, and then we can remove the filter cup and end the extraction.In the end, the extraction time fell to 2 minutes and 30 seconds. Although the brewing time is 30 seconds longer than that of 15g powder, the coffee is just as delicious. The flavor of strawberry candy is well displayed, including strawberry gummy candy, white floral aroma, raisins, berries, and the aftertaste is the aroma of wine, which is very rich in layers.3. Adjust coarse grinding/lower water temperatureIt doesn’t matter if you don’t have a 02 model large filter cup at home! We can also reduce the extraction rate of coffee through other methods to avoid over-extraction. There are two adjustment methods, the first is to adjust coarse grinding!By adjusting the coarse grinding, the gaps between the coffee powder will be increased, and the water discharge speed will be increased. At the same time, the extraction efficiency will also be reduced, which can effectively prevent the coffee from being over-extracted. Generally speaking, it is enough to adjust the roughness by 0.5 notches on the original basis.The second is to lower the water temperature for brewing coffee! By lowering the water temperature, we can reduce the extraction efficiency of hot water, so that even if it is brewed for a long time, there is no need to worry about the negative substances in the coffee being dissolved. Just lower the temperature by 2~3°C from the original level. And because lowering the water temperature will not affect the time, the overall extraction time is not shortened, so the coffee brewed by lowering the water temperature will taste more balanced and have a relatively mellow taste, which is also a very good experience~
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
