A good cup of coffee requires not only careful preparation by the barista, but also careful grinding of coffee beans. Every move of a barista determines the color, taste, aroma, etc. of a cup of coffee. Baristas are the most important decision makers for coffee, and how to grind coffee beans has become the basic technology that every barista should have.
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First, the ideal time for coffee grinding
The best time to grind coffee is to grind it before it is ready to be brewed. Because the ground coffee is easy to oxidize and lose its aroma, especially without proper and proper storage, the coffee powder is also easy to change flavor, and naturally it is impossible to brew fragrant coffee.
Second, the golden rule of coffee grinding
The finer the grinding accuracy, the larger the coffee surface area, the higher the extraction rate; the longer the contact time with water, the extraction rate can also be increased. It can be said that no matter which brewing method, as long as these two factors are balanced, the delicious coffee is not far from us.
Third, what principles should be followed in the grinding method
1. The grinding degree suitable for the brewing method should be selected;
2. The temperature of the cattle produced during grinding should be low;
3. The powder after grinding should be uniform;
4. Grind before brewing.
When grinding beans, the thickness of the powder depends on the cooking method. In general, the shorter the cooking time, the finer the ground powder; the longer the cooking time, the coarser the ground powder.
Fourth, the choice of grinding tools
No matter what kind of grinder is used, it will definitely generate heat during operation. Most of the fine substances are highly volatile. The heat of grinding will increase the rate of volatilization, and the mellow alcohol will be lost in the air. After the coffee beans are ground, the cell wall will completely disintegrate. At this time, the area in contact with air will increase a lot, the rate of oxidation and deterioration will increase, and the coffee will lose its flavor within 30 seconds to 2 minutes. Therefore, it is recommended not to buy coffee powder, it is best to buy coffee beans, and only grind them before drinking. Before the grinder was invented, humans grinded coffee beans using a stone pestle and bowl. A doctor once experimented with this ancient tool and compared it with a modern grinder. It is said that the coffee powder ground by a pestle and stone bowl can best smelt the aroma.
According to logical reasoning, the pounding of the coffee beans by cracking the natural way should not damage the cell wall and retain the fine substance of coffee. However, in modern life, it is almost impossible to use a pestle and stone bowl to grind coffee beans. Therefore, it is extremely important to choose a good grinder.
Fifth, the method of grinding
The grinding method of coffee beans can be divided into three types: coarse grinding, medium grinding and fine grinding. Use a suitable grinding method depending on the coffee appliance. There are also medium fine grinding or finer and fine grinding (finely ground coffee powder) than fine grinding.
1. Fine grind: The particles are fine and the size is like sugar.
2. Medium grind: The granules are the same size as granulated sugar and coarse white sugar.
3. Regular grind: The granules are coarse and the size is like coarse white sugar.
