The crema of espresso, the golden layer of dense foam floating on the surface of the concentrate, is the visual business card of a good cup of coffee. Whether the fat is thick or not and the texture is uneven, directly affects the latte art effect and concentrated taste level of the latte. If you choose the right beans, the oil will be basically guaranteed. Blend base beans are the basis for oil expression. The significance of blending is to use multiple production areas to complement each other, and one important dimension is oil. Due to the wet planing and deep roasting processes in the Mandheling production area, the fat is usually thick, so it is very suitable to serve as the fat in blends. The oils of Brazilian sun-dried beans are also good, and nuts and cocoa are rich in oils. The oil of Colombian washed beans is medium, clean but not as thick as Mandheling and Brazil. If the blended beans contain producing areas with outstanding oils, the overall oils will be guaranteed. The classic blend uses the Mamba formula. Mandheling gives the oil and mellow layer, and Brazil gives the nutty sweetness. The two flavors support each other, and the oil and sweetness are both present. The influence of roasting degree on fat is decisive. Medium-dark roasted beans have the thickest oil because more carbon dioxide and soluble oil are produced during dark roasting. These substances are emulsified into the coffee liquid during high-pressure extraction to form oil. Medium roast has medium fat, light roast has thin fat. Choose beans with good fat and medium-dark roasting is a safe choice. If you use light roasted beans to make Italian style, the coffee will not have enough presence when making latte with thin fat. You need to increase the amount of powder or reduce the liquid weight to make up for the concentration. The black cocoa is blended with 100% Arabica beans, which has plenty of oil and a mellow taste at an affordable price. The premium blend uses Brazilian Cerato and Colombian Whelan, with a classic and mellow flavor and stable oil performance. Autumn chestnuts are blended with selected Honduran Caturra and Papua New Guinea Typica, which combines a warm and delicate mellow flavor with a balanced structure. These blended soybean oils all perform well and are guaranteed to be used as Italian base oils. The oil performance of single-origin beans in Italian style varies depending on the production area. Mandheling single product is dark roasted and made in Italian style. It has thick oil, deep color and thick and long taste. The Brazilian Queen's Manor is made in Italian style, with medium to thick oil and nutty caramel sweetness and warmth. Papua New Guinea Bird of Paradise is made in Italian style, with medium fat and a clean and pure taste. Panamanian Geisha is made in Italian style. The oil is thin but the color is light golden and the texture is light. When choosing single-origin beans for Italian style, if you are looking for fat thickness, Mandheling and Brazil are the first choices. Freshness is another key variable in fats. Coffee beans continue to release carbon dioxide after roasting, and the gas is most intense in the first 7 to 10 days, during which time the extracted oil is thickest. After more than 30 days, a large amount of carbon dioxide is lost and the oil becomes significantly thinner. When choosing beans, pay attention to the roasting date. Start using them after 7 to 10 days of raising the beans after buying them. During this period, the oil performance will be in ideal condition. A 250g pack of beans lasts about two weeks, which is exactly within the ideal tasting period. Powder volume and liquid weight also affect grease performance. The standard powder volume is 18 grams with a 58 mm powder bowl, the liquid weight is 36 grams, and the time is 25 to 30 seconds. This set of parameters can extract thick and dense oil. If the amount of powder is too small, the oil will be thin, and if the liquid weight is too long, the oil will be diluted. After fixing the parameters, as long as you confirm that the grinding degree has not changed every day, the performance of the grease will be stable.
The logic of selecting mellow fat beans can be summarized in three rules: choose Mandheling or Brazilian beans in the blend, choose dark roasted beans, and choose freshness within 7 to 30 days. If these three conditions are met, the oil performance will not be bad, and you will have a good foundation for making latte art and concentrated pure drinks.
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
