The grinding of coffee

Coffee beans, the dark brown beans seem ordinary, but they have a lot of knowledge at all stages. For a coffee cook and drinker like me, coffee beans are grown, produced and roasted. I think it is enough to have a general understanding of professional knowledge, and coffee merchants can be responsible for the production. After all, this is an era of paying attention to the division of labor. But it is the responsibility of our users to grind and make coffee, and we must have a clear understanding.

The ideal time to grind coffee is to grind it before cooking. Because ground coffee is easy to oxidize and lose its flavor, especially without proper storage, coffee powder is also easy to change flavor, so it is naturally impossible to cook mellow coffee. Some people are afraid of trouble or do not want to buy more bean grinders, so they usually buy ready-made coffee powder when they drink coffee at home. At this time, they should pay special attention to the problem of storage. Because the climate in Taiwan is humid, it is best not to place coffee powder at room temperature at will. A more appropriate way is to put it in a sealed jar and refrigerate it in the refrigerator, and do not put it in the same place with garlic, fish and shrimp and other heavy-flavored food. Because the coffee powder is easy to absorb, a careless coffee becomes a strange taste coffee, then even the best quality coffee will be spoiled. However, some people put the cooked coffee powder in the refrigerator as a deodorant, which is a good way to make the best use of things.

When grinding beans, the size of the powder depends on the way it is cooked. Generally speaking, the shorter the cooking time, the finer the ground powder; the longer the cooking time, the thicker the ground powder. Sixth, in terms of the actual way of cooking, it takes a very short time for the ESPRESSO machine to make coffee, so the grinding is the finest, and the coffee powder is as fine as flour; it takes more than a minute to cook coffee in the "plug wind" way, and the coffee powder belongs to medium-sized grinding; American filter coffee takes a long time to make, so the coffee powder is the thickest, one by one like Beijing grains on a shell beach. Grinding coffee powder with the right thickness is very important for making a good cup of coffee, because the extraction of water-soluble substances in coffee powder has its ideal time, if the powder is very fine and cooked for a long time, resulting in excessive extraction, the coffee may be very bitter and lose its aroma. On the other hand, if the powder is coarse and cooked too fast, resulting in insufficient extraction, the coffee will be tasteless because it is too late to dissolve the water-soluble substance in the powder.

There are different brands and types of bean grinders for grinding coffee, and the ideal one is a grinder that can adjust the thickness of the beans.

Coffee beans contain oil, so the bean grinder must be cleaned after grinding, otherwise the grease will be fouled and will smell stale after a long time, and even the most advanced beans will be ground into a strange-smelling powder. After each use of the bean grinder, be sure to wipe the blade table with the wet market and clean the plastic top cover with warm hot water. But for the American popular flavored coffee, the added flavor is strong and strong, and it will last for a long time. It is best to put two tablespoons of white Jing sugar in and beat it before cleaning. Of course, it is better for a grinder to grind only the same kind of beans, so there is no problem of mixing.

According to the size of coffee beans, the grinding methods can be divided into rough grinding, medium grinding and fine grinding. Use the appropriate grinding method according to the coffee utensils.

There are also medium and fine grinding or finer and finer grinding than fine grinding (powdered coffee powder). The time to grind coffee beans is to brew coffee and only grind the required portion to be of high quality. After the coffee bean is ground into powder, its surface area increases and absorbs moisture, which is easy to oxidize. In short, with the passage of time, coffee powder also plays a role of deterioration to damage the flavor.

And after the ground coffee beans are placed, the carbon dioxide retained inside the coffee beans will be lost together with the aroma. In this way, when the coffee powder is extracted and filtered, the coffee powder should be expanded without expansion, and the coffee can not be brewed anyway. The secret is to consider grinding and homework consistently, so brewing coffee is the most delicious and mellow.

Fine grind Medium grind Regular grind

● medium grinding ● fine grinding ● rental grinding

The particles are fine and the same size as sugar. The particles are the same size as a mixture of granulated sugar and crude sugar. The granules are thick and the same size as coarse sugar.

The secret of grinding coffee beans

The grinding tool for coffee beans is a bean grinder. Bean grinders can be divided into three types:

● family uses manual rotary bean grinder. It is suitable for leisure people with small demand, large particles and killing time.)

● household electric bean grinder. It can grind coffee powder of all kinds of particle size, and it can grind out 6 people at a time.)

● specializes in using electric bean grinder. (for commercial use, coffee powder of more than one pound or less can be ground at a time.)

The following two points should be paid most attention to when grinding coffee beans:

● reduces the heat of rubbing. (grinding heat will cause the aroma of coffee to dissipate early)

The size of ● particles is uniform. (uneven particle size will make it impossible to control the brewing time.)

So if you use a family-style manual bean grinder, you should rotate gently so that it does not produce friction heat as much as possible. To sum up, if you consider the quality, quantity, time and convenience of grinding beans, the use of electric bean grinders for home use will be the best choice.

Grinding and extraction

Suitable for fineness grinding-Turkish copper pot (Ibrik, fine powder), mocha pot, espresso machine (very fine grinding).

Suitable for medium grinding-filter paper dripping method, flannel dripping method, air stopper.

Suitable for roughness grinding-water drop coffee machine (extreme roughness grinding), trickling filter pot (extreme roughness grinding)