Coffee grinder: coffee bean grinding skills, basic knowledge of coffee grinding and brewing

The ideal time for coffee grinding 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. Do people who don't know how hard it is to grind coffee? In the era of full automation, the pursuit of perfection is becoming more and more urgent. Wang Sen Coffee West Point School strives for perfection in continuous research and development. For coffee grinding, coffee bean grinding skills, coffee grinding and brewing of the basic knowledge, Wang Sen Coffee School has made a perfect answer, if you want to learn coffee, then start with coffee grinding, brew a cup of the most primitive and strong coffee, slowly taste the mellow that belongs to you!

Introduction to coffee grinding:

The operation of crushing roasted coffee beans is called grinding. The props used to grind coffee beans are called grinders.

Some people are afraid of trouble or do not want to buy a bean grinder, 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. If the climate is humid, it is best not to place the coffee powder at room temperature after opening it. 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 foods with heavy flavor. 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.

Coffee beans, the dark brown beans seem ordinary, but they have a lot of knowledge at all stages. For a coffee cook and drinker, it is enough to have a general understanding of the professional knowledge of the cultivation, production and roasting of coffee beans, and the production can be left to the coffee merchants. After all, this is an era of paying attention to the division of labor. However, it is the user's responsibility to grind and make coffee, and we must have a clear understanding.

When grinding beans, the size of the powder depends on the way it is cooked. 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 appropriate 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 over-extraction, the coffee may be very bitter and lose its aroma. On the other hand, if the powder is coarse and cooked too fast, leading to insufficient extraction, then the coffee will be insipid because there is no time 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. When grinding with a bean grinder, do not grind too much at one time, just enough powder for one time, because the longer the bean grinder is used at one time, the easier it is to get hot, which indirectly causes the coffee beans to be heated in the grinding process and causes the aroma to be released in advance, which will affect the aroma of the cooked coffee.

Coffee beans contain oil, so the bean grinder must be cleaned after grinding, otherwise the oil scale will be stale over a long period of time, and even the most advanced beans will be ground into strange-smelling powder. After each use of the bean grinder, be sure to wipe the blade machine 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 is also medium 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.

Grinding principles:

Generally speaking, a good grinding method should include the following four basic principles:

1. The degree of grinding suitable for brewing and cooking should be selected.

2. The temperature of cattle produced during grinding should be low.

3. The powder particles after grinding should be uniform.

4. Grind before cooking.

No matter what kind of grinder is used, it is bound to generate heat by friction in operation. Most of the fine substances are highly volatile, the heat of grinding will increase the speed of volatilization, and mellow is lost in the air. After the coffee bean is ground, the fine cell wall will completely disintegrate, the area of contact with air will increase a lot, the rate of oxidation and deterioration will be faster, 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, grinding before drinking, grinding should be brewed as soon as possible. Before the invention of the bean grinder, people used stone pestles and bowls to grind coffee beans. A doctor once experimented with this ancient tool and compared it with a modern bean grinder. It is said that the coffee powder made from pestles and stone bowls is the most mellow.

According to logical reasoning, the pestle cracked the coffee bean naturally by impact, which should not destroy the cell wall and retain the excellent substance of coffee. However, in modern life, it is almost impossible for people to use pestles and stone bowls to grind coffee beans, so it is particularly important to choose a good bean grinder.

Grinding skills:

The task of grinding roasted coffee beans into powder is called crushing, and the props for grinding coffee beans are called grinders.

Grind the coffee and enjoy its aroma. And then experience the fun excitedly. According to its size, the grinding methods of coffee beans can be divided into three types: rough grinding, medium grinding and fine grinding. Use a suitable grinding method according to the coffee utensils. There is also medium fine grinding or very fine grinding (powdered coffee powder) which is finer than fine grinding. The timing of grinding coffee beans is before brewing coffee, only the need for grinding is the top grade. After the coffee bean is ground into powder, its surface area increases and absorbs moisture, which is easy to oxidize. In short, coffee powder 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 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 you can't make delicious coffee anyway. The secret is to consider grinding and homework consistently, so brewing coffee is the most delicious and mellow.

Finegrind

◎ fine grinding (fine particles, the same size as sugar)

Mediumgrind

Grinding in ◎ (particles the same size as a mixture of granulated sugar and coarse white sugar)

Regulargrind

◎ rough grinding (coarse particles, the same size as coarse sugar)

The knack of grinding coffee beans

The grinding prop for coffee beans is a grinder. There are numerous types of mills ranging from manual at home to large electric ones for business. Household grinders can also be used as decorations, and the number of people need more than one grinding, or electric to facilitate.

According to the structure of the grinder, there are grinders that use vertical and horizontal groove blades to cut coffee beans and those that grind coffee with molars. Each has its own advantages, and the situation of business use tends to mass production of the electric type as the mainstream.

However, the following two points should be paid most attention to when grinding coffee beans:

The friction heat of ① is suppressed to a minimum. (the aroma will fly away because of the fever)

Whether the size of ② particles is uniform or not. (if the particles are uneven, the concentration will be uneven.)

Taking this as a consideration, if you are a household mill, you should rotate it gently and take care to avoid friction heat as much as possible. Therefore, it is more appropriate to use electric grinders.

How to use the mill

Grind the beans before brewing.

There are two types of household mills: manual and electric. The manual type is used if the number is small, while the electric type is more convenient for the large number of people.

Determine the grinding method (particle size) with the bubbling apparatus.

Manual grinders should be careful not to produce friction heat only. And pay attention to whether it is mixed with other things.

Whether the granules of ground coffee beans are large and neat or not should be checked. (in the case of uneven particles, it is possible that the function of the grinder is always, or coffee roasting is not symmetrical, etc.)

The grinding of coffee

In the Middle East, people still use the method of mashing beans into particles of different sizes, but when most people have gradually used bean grinders, Mr. Wang of Wang Sen Coffee School personally did an experiment on whether it is better to mash or grind, both for public trust, and invited gourmet spectators to taste the two kinds of coffee at the same time. In the end, everyone thinks that mashed coffee powder is more fascinating than ground coffee.

To grind satisfactory coffee powder, it is really very simple, as long as you try a few more times to find out your favorite flavor, in fact, there is no certain standard. But generally speaking, the aroma of coffee powder (powerdered) that is too finely ground is easy to run away and is more suitable for fresh grinding and drinking.

The next level of coffee powder (veryfine) is used when using an electric coffee pot, because the fine coffee powder brews more coffee, which is usually used in company or restaurant side drinks.

Then there is fine, which is about as thick as sugar, and dripping cooking is very suitable for this kind of thickness.

Medium (medium), the amount of granular coffee powder in brewing is small, you have to put more coffee particles, so the coffee brewed is more fragrant, some coffee pots also use medium coffee powder, because too fine powder will fall into the sieve plate, but the water in the pot takes more than 10 minutes to brew a pot of coffee and the amount is small, it can be said to be the most uneconomical particles.

There are many kinds of bean grinding machines, of which the most common is the household electric bean grinder, which can grind out particles of different sizes, small and light, and the price is not very expensive, so it is a good choice for families or people when there are few people.

The manual bean grinder is the kind that looks antique and picturesque in a coffee shop, even if it is not used as a decoration, but the particles produced by this bean grinder are relatively large and slow.

The professional electric bean grinder used in the coffee shop can grind out a variety of particles of different thickness. high speed and large quantity are the advantages of this kind of bean grinder.

Many new Espresso coffee machines are equipped with bean grinding function, but the risk is that it may not be able to meet your requirements, how to choose, it all depends on the choice of consumers. When choosing, we should pay attention to the grinding knife in the machine, it is best to use a tapered coffee bean grinding knife, all tooth profiles are cut and shaped, to ensure that the tooth profile is sharp, uniform, accurate and stable grinding quality. Because the fine tooth of the tool is thicker than the coarse edge, the oblique edge makes the adjustment of the grinding thickness fast, and the powder can be fine or coarse and suitable for all kinds of coffee brewing requirements.

Espreeso uses pneumatic brewing, the whole process only takes 20-25 seconds, in such a short time, whether the essence of coffee can be properly extracted, the size of the powder is extremely important. If the powder is too fine, the area of steam penetration becomes relatively larger, which will cause excessive extraction, concentrated but not fragrant. If the partner is too thick, the resistance is low, the coffee becomes thin and the creme becomes orange. Therefore, the purchase of bean grinder to have fine-tuning function is better. Cheap bean grinding mechanism image household multi-function mixer, the blade is in the shape of a windmill, and the ground beans are square in shape and unfavorable for extraction. The use of coffee bean grinding knife head machine, sharp blade, wear and tear durable, so that coffee quickly crushed, so that coffee flavor is better, although the unit price is higher, but still worth it.

Basic knowledge of coffee grinding and brewing

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 grinding powder; the longer the cooking time, the thicker the grinding powder.

In the way of actual cooking, the time required for ESPRESSO machine to make coffee is very short, so the grinding is the finest, and the coffee powder is as fine as flour; it takes about 1 to 3 minutes for siphon to cook coffee, and the coffee powder is ground of medium thickness; the thickness of American coffee maker and handbrew is generally the fineness of granulated sugar. The proper grinding degree of coffee powder 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 steamed 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. Do not use chopper-type grinder, machete-type grinder is easy to cause uneven thickness. In this way, the coarse powder is not enough to extract the fine powder has been over-extracted. It is conceivable that the coffee brewed in this way must be bitter and astringent, with mixed flavors. When grinding with a bean grinder, do not grind too much at one time, just enough powder for one time, because the longer the bean grinder is used at one time, the easier it is to heat up, which indirectly causes the coffee beans to be heated in the process of grinding and causes the aroma to be released in advance, which will affect the aroma of the steamed coffee. Fresh coffee beans are emerald green and must be roasted, fried, ground into powder, and brewed before they can become the coffee sold by the store. Experts point out that good coffee must be full of color, aroma and taste.

Color-the color of the coffee after brewing is best if it is dark brown with a little amber, which means that the coffee beans are cooked properly.

Fragrance-the unique aroma of coffee, the stronger the fragrance is, the longer the aroma is, the better the quality is.

Taste-balanced and thick in the mouth, long-lasting and obvious, is good coffee, but whether the taste is mellow or not is closely related to the method of brewing, if it fails to cook, it will be counterproductive.

Source:

Wang Sen's blog of Western Food and Coffee College