To judge whether the coffee shop is professional or not, look at the bean grinder first.

For professional baristas, please follow the coffee workshop (Wechat official account cafe_style)

If you have prepared five thousand yuan for coffee equipment, please reserve three thousand of it for the bean grinder. " I said.

From being an enthusiast in the past to opening a shop now, whenever someone wants to carry out a trip of boutique coffee, I give it to you with this motto. That is, grinding is? The importance of the above has not been discussed in detail. Coincidentally, a column in the New York Times on the 31st of last month mentioned the role of bean grinders. It can be seen that there are still a small number of people who pay attention to the quality of coffee, both at home and abroad.

The blender grinds the beans!

To make the coffee taste evenly, the beans must first be ground to increase the surface area in contact with water. The ideal bean grinder can produce coffee powder of the same size and "grains are like waves". The problem is that the texture of roasted coffee beans is as fragile as wooden chopsticks, and it is impossible to divide them equally into two or four. In addition, after each split, there must be a fine powder commonly known as "fine powder" left, affecting the extraction. Therefore, volume distribution (grind distribution) and fine powder control (fines control) are important indicators for enthusiasts to buy bean grinders.

"using an electric blender to grind and flush? why is the taste so different from that of drinking in a restaurant?" Asked the coffee friend.

The high-speed motors in the blender split the beans with a rotating blade. If you look at it under a microscope, the size of the chopped coffee is extremely uneven. When boiled, the bulk powder will not be extracted enough, while the fine ones will be overextracted. No matter how good the beans are, they will taste both boring and bitter. Just like Chinese people eat steamed meatloaf, if the pork is chopped unevenly, the minced meat is large and fine, and the taste is not good, the larger pieces of meat are more likely to be understeamed! There is another fatal reason why it is not good to grind coffee with a mixer, which is the temperature and the number of impacts. High-speed motorcycle will produce high heat, and objects will also produce heat when they are cracked by external forces. Coffee is intoxicating, mainly from aroma. But what if? Before cooking, the aroma originally locked in the powder volatilizes due to high temperature, and there is little flavor left in the cup.

Siphon? Boil "win in Ghost mortar"

Professional bean grinder, mostly flat knife grinder (flat burr) or conical grinder (conical burr). There have been many detailed comparisons between enthusiasts about the advantages and disadvantages of the two. To put it simply, the former is suitable for many kinds. The different roughness required for the brewing method, which is mainly used as espresso (espresso). A flat mill is like a stone mill for grinding soy milk. Remember the siphon? After winning the cooking competition, the contestant revealed that the reason for his victory was "winning in the ghost mortar" (ghost's teeth). The Japanese bean grinder he used was covered with tiny conical protruding patterns. This design is not suitable for espresso, but with it? Boil your hands? Coffee tastes clean and layered.

The best bean grinder is not easy to find in a coffee shop. Because in a high-flow environment, stability is more important than taste. If some models can be adjusted to sweet spot (the best scale), even if they can give full play to the potential of coffee, but this range is quite narrow. Different baristas make coffee with slightly different gestures, which is easy to miss, resulting in unstable quality. The most reliable bean grinder in my shop was suggested by British baristas who had not yet dominated the world at that time. He once said: "this is not the perfect adjustment of the tapered disk machine, but the tolerance is very high." When the four of us are busy? The taste of coffee is not far from each other. " In addition, simple cleaning, small space for dead corners and reducing the accumulation of stale coffee powder are all factors to be considered.

So, when you enter a coffee shop, you must first look at the bean grinder!