I believe that many friends now like to drink coffee and are interested in coffee roasting. FrontStreet Coffee When surfing the Internet, I often see friends sharing their process of roasting coffee beans at home on social platforms. However, I will also notice that after some friends complete the roasting, the color of the coffee beans is not uniform, with some light colors and some dark colors.
The roasting degree and uniformity of coffee beans determine the taste of coffee. That’s why it’s so important to understand the effects of roasting on coffee beans. Before understanding the roasting degree corresponding to the color of coffee beans, FrontStreet Coffee will briefly talk to you about how to roast coffee beans at home.
There are many weird ways to roast coffee beans at home on the Internet, such as pan frying, oven, air fryer, etc. However, these tools cannot always ensure that the coffee beans are fully rolled and heated evenly. Therefore, FrontStreet Coffee recommends that everyone buy a tumbler-shaped coffee bean roasting net.
When using a tumbler to roast coffee beans, based on the personal experience of FrontStreet Coffee baristas, you need to pay attention to two points: Roast over low heat, otherwise the coffee beans will easily change color on the outside and be uncooked on the inside; after turning on the fire and adjusting the fire size, put the tumbler on and turn it immediately, with a rotation speed of 60-65 turns/minute. Roasting using a tumbler takes more than twice as long as using a dedicated roaster. For example, FrontStreet Coffee uses Yang's 800n to roast red bourbon coffee beans from the Cerrado region in Brazil. The first cracking time is 3:30, which is a medium-dark roast, and the total roasting time is 13 minutes.
This is the Brazilian Cerato coffee beans roasted by FrontStreet Coffee using professional machines.
When using a tumbler to bake, the total baking time is 31 minutes. During this period, the cage has to be rotated continuously (60 turns/minute). If it stops/slows down, it will be easily confused...it can be said to be quite labor-intensive.
This is the same type of coffee beans roasted by FrontStreet Coffee baristas at home using a tumbler
Although roasting coffee beans at home is tiring, you can clearly and intuitively feel that the coffee beans slowly turn from green green beans to yellow, exuding a sweetness like corn, then slowly turn into the color of cinnamon, exuding the taste of caramel, and then slowly turn into chocolate color, exuding the taste of roasted nuts.
This process is very healing, and I understand that in order to roast coffee beans to taste, you need to understand the coffee beans themselves, and you also need to learn the impact of the development of the roasting process on the taste of the coffee beans, so as to cherish every cup of coffee more.
If we simply classify the coffee beans sold on the market, the sour ones are basically light roasts, the bitter ones are dark roasts, and the ones that are both sour and bitter are medium roasts. In the coffee degree color comparison card provided by SCAA, the world's most authoritative specialty coffee association, coffee roasting degrees are divided into 8 types:
The shallowestAgtronThe color value is95, the roasting degree is called light roasting (Light Roast), the roasting time is around the time when the first crack is intensive (the beans are roasted while they are still crackling). Generally, the flavor of coffee will show bright acidity.
The left side is a medium-light bake, the right side is a medium-dark bake
AgtronThe color value is85, belongs to Cinnamon Baking (Cinnamon Roast), the release time is around the end of the first crack (when the popping sound has just stopped, or there are only sporadic popping sounds left). Generally, the flavor of coffee beans at this level will be mainly sour, with a sense of sweetness.
AgtronThe color value is75, called a medium roast (Medium Roast), the release time is approximately after the first crack (the popping sound has completely stopped). The coffee flavor at this level will be mainly sweet, with a little fruity acidity.
AgtronThe color value is65, called dark roast (High Roast), the release time is about after the first crack ends but before the second crack begins (a quiet period of about 1-2 minutes). The flavor will show a nutty caramel tone, balanced and without sourness.
AgtronThe color value is55, called urban baking (City Roast), the release time is around the beginning of the second explosion (a period of silence followed by one or two weak cracks). The flavor at this time is more bitter and the caramel aroma is stronger.
AgtronThe color value is45, called Citywide Baking (Full City Roast), the brewing time is about before the second explosion (before the crackling sound is heard), the coffee at this time is already very dark, and the taste will be more burnt, bitter and fragrant.
AgtronThe color value is35, called French baking (French Roast), the release time is around the time when the second explosion is intensive (the crackling sound is heard again, but it is heavier than the first time), and the coffee beans at this time have begun to leak oil.
AgtronThe color value is25, called Italian baking (Itatian Roast), the release time is around the end of the second explosion (after the intensive sound). At this time, the coffee beans are dark and translucent, and the oil has penetrated out of the bean surface.
According to the observation of FrontStreet Coffee, whether it is roasted by machine or roasted by friends, coffee beans are usually not roasted to a color value of 65 or above. Because of the deep roasting in the channel, the taste of the coffee is already very mellow and rich, without too many flavor levels.
If you don’t have a certain understanding of tumbler roasting, it is not recommended that you roast too lightly, because it is easy for the surface of the coffee beans to reach the color you want due to failure to control the heat, but the inside of the coffee beans is not roasted thoroughly, and grass is prone to appear in the coffee./Astringent taste~
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
