How to grind coffee beans? 8 common hand coffee grinder recommended

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Roasted coffee beans cannot be brewed directly.

Some students or guests also ask this question.

"my friend brought me a bag of coffee beans from abroad. How can I drink them at home? can I just put them in a pot and cook them?"

In fact, if not fastidious, of course, there is no way, the professional practice is to grind the coffee beans into powder, and then use the coffee maker to extract the coffee liquid.

Of course, there are a variety of utensils for extracting coffee, which we will introduce in detail later on one by one.

Today, we will mainly talk about the impact of the degree and thickness of coffee grinding on coffee.

Coffee beans can only be kept fresh for 5 minutes after grinding.

Test data from professional institutions prove that coffee beans escape nearly 50% of their active volatile aromas within the first 5 minutes of grinding.

If you buy coffee powder (except filled with inert gas), do not expect too much from the taste and flavor, but only take convenience as the starting point of demand. And buying the worst grinding equipment will be hundreds of times better than buying coffee powder directly, enthusiasts should settle down to learn how to grind coffee beans.

In order to extract the flavor and essence of coffee, the process of grinding coffee beans before extraction is essential. This seemingly simple process contains a lot of knowledge and exquisite. As a matter of fact, the lack of taste and flavor of many friends' DIY coffee is not due to the poor quality of coffee beans, the lack of roasting, nor the lack of freshness, but often due to loopholes in the grinding process.

After the coffee bean is ground, the complete destruction of the cell wall causes it to be in a completely open state, and it will be filled with attractive coffee aroma, which is also the rapid escape process of coffee aroma. In addition, the rapid increase in contact area with air will also increase the speed of oxidation, making coffee beans quickly "stale".

Therefore, the ground coffee powder can not be preserved, and the grinding operation should be carried out before extraction.

The aroma intensity and odor characteristics of coffee beans released during grinding is also an important means to judge whether coffee beans are fresh or not. The stronger the aroma, the fresher the coffee beans, and the thinner the aroma, the worse the freshness of the coffee beans. In addition, coffee beans that have been stored for too long not only release a light aroma, but also have a rancidity and stale smell when grinding, which needs to be noted.

Points.

The surface area of a coffee bean is almost 10 times larger than that of 3.4cm.

The coarser the grinding, the smaller the surface area of the coffee powder, the slower the oxidation rate by air, the smaller the contact area with water during extraction, the less beneficial ingredients extracted, the lower the concentration of coffee liquid, the stronger the sour taste and the weaker the bitter taste.

On the other hand, the finer the grinding, the larger the surface area of the coffee powder, the faster the speed of oxidation by air, the larger the contact area with water during extraction, the more beneficial ingredients extracted, the higher the concentration of coffee liquid, the weaker the sour taste and the stronger the bitter taste.

The evaluation of grinding level is not based on fineness, because different grinding fineness is used to match different extraction occasions to meet different tasting needs. The uniformity of grinding particles is the main basis for judging the grinding level. Some students like to DIY coffee at home, using high-quality coffee beans purchased online, and their freshness is justifiable, and their water quality and extraction technology are also outstanding, but in the eyes of some strict professionals, they are "abusive".

The reason lies in the extremely unprofessional grinding process-some particles are very large, some have become fine powders. If this mixture is extracted, the equilibrium of the extraction will be completely broken, and the real and pure taste of coffee beans will be torn ugly and muddy. How can we express the authenticity of the gift of nature?

Interested in this can be combined with the following "brewing and extraction chapter" to further learn.

Just as we discuss the different degrees of roasting, it is necessary to make a descriptive summary of the grinding fineness of coffee beans.

Granulated sugar, salt and flour, the three necessities of daily life, have become important references.

A roughness grinding (CoarseGrind). Roughness grinding does not mean that infinite roughness is allowed. Granules like granulated sugar are the most common roughness grinding degree. The degree of extraction of this kind of grinding degree is relatively low, so it is suitable for those who use thicker strainer or coffee for longer soaking.

Extracted coffee making utensils, such as French filter presses.

B medium grinding (MediumGrind). The particle size of moderate grinding degree is between white sand particles and salt. Most of the drip filter coffee making utensils with slow extraction process are suitable for moderate grinding, such as siphon pot, manual drip brewing and so on.

C fine grinding (FineGrind). We often describe fine grinding as follows: it looks very fine at first glance, but it feels rough with your hands, and salt is the closest fineness. If a mocha pot is used, this kind of grinding thickness is the most suitable.

D Italian concentrated grinding (EspressoGrind, also known as fine grinding). We can describe Italian concentrated grinding like this: it looks like a fine powder, but it still feels slightly grainy when squeezed with your fingers. Its thickness is between salt and flour, so it is mainly suitable for Italian espresso machine to extract Espresso.

E Turkish grinding (TurkishGrind, also known as very fine grinding). The degree of very fine grinding is similar to that of flour, which can be turned to ash after blowing, and there will be no creaking sound when it is rolled over with hard objects on a hard table. This degree of grinding is mainly used to make Turkish coffee, which is relatively rare.

There is a close relationship between grinding thickness and extraction degree, but it is difficult for beginners to accurately define it. In addition to looking for reference materials such as flour, salt and sugar, kneading and rubbing with your fingers and gradually establishing a correct tactile sensory standard is the only way.

-introduction of portable manual bean grinder (8)-

First of all, we need to know that the movement of the hand bean grinder is divided into metal and ceramic.

Metal is easy to get hot when grinding, which makes the aroma of coffee beans volatilize ahead of time. The ceramic is fragile, but the ceramic basically does not heat up, so the fragrance is corrected. Cast iron has a longer life than ceramics, although ceramics are wear-resistant, but they are actually easy to break, and domestically made ceramic mold cores are even more difficult to survive a year. The use of cast iron for a long time is nothing more than wear and tear lead to more uneven, but can be used for many years. The advantage of ceramics is that they can be washed, but in fact, they can't be washed clean at all. on the contrary, they have to be dried after washing, and they are accidentally broken after washing.

Domestic brand

Taimo Chestnut G1/G1S Titanium hand Bean Mill

Price: within 850 yuan

Evaluation: it may be the default of hand-made coffee lovers: the most outstanding one in the domestic hand-in-hand grinding.

Why do you say that? Tamo Chestnut G1/G1S this bean grinder slender shape, suitable Radian, comfortable feel, are very suitable for daily use of hand bean grinder.

The overall industrial design, grinding thickness, the use of texture compared to the imported hand mill, can be said to be super cost-effective!

Anonymous second generation bean grinder

Price: 480 yuan (unit) 560 yuan (Italian)

Evaluation: the metal core grinding core is made of stainless steel precision machined by CNC. There are double brackets and double bearings inside the body to fix the middle shaft. The utility model has the advantages of uniform grinding, little fine powder, strong and durable.

A model with good performance-to-price ratio in domestic brands.

Imported brand

Japan PORLEX manual bean grinder

©Xiaoming loves to travel.

Price: within 350 yuan

Evaluation: grinding fine powder is better, ceramic grinding core. It is small in size and easy to carry. The heat generated by grinding is lower, and the loss of coffee flavor is less. The disadvantage is that if you use it for a long time, the fine powder will gradually become more and more, and the powder cartridge capacity is smaller (35g to 45G). The Qianjie Coffee individual thinks the whole recommendation has a good texture and the highest performance-to-price ratio! Highly recommended 😯

Japanese HARIO hand bean grinder

Price: within 200 yuan

Evaluation: ceramic grinding core, easy to disassemble, whole body washable. Small size and good portability. The central shaft is plastic, less hard beans to grind. It is a little difficult to use.

The grinding core of HARIO is manufactured by Kyocera and assembled in China. The grinding core of Kyocera CM45 can grind the powder needed by Espresso. I feel that grinding espresso powder is better than special electric grinding (not the best hand mill, such as HG-ONE).

You can buy this 😯 for an entry-level hand mill.

Domestic fine Heller Helor 101hand bean grinder

Price: 749 yuan 1029 yuan

Evaluation: stainless steel spindle, portable, high precision, all parts can be replaced, the price is high. Italian-style knife, at the same time, there are individual ceramic knives to choose from, good feel, high appearance. The cutter head is made of martensitic stainless steel, washable and non-rusty. Less fine powder and high uniformity. The capacity of powder cartridge is small (25-35g). The new upgraded version of 108 Qianjie coffee has not been experienced yet, the upgraded version may be better.

American Handground hand bean grinder

Price: 498-628 yuan

Evaluation: this Handground hand mill brings together thousands of coffee lovers around the world to participate in R & D and design.

The reason why many hand grinders have become the concern of everyone's choice is that there is little or no room to adjust the grinding thickness. However, this hand mill easily twists 15 gears to adjust the grinding thickness, 40mm tapered cutter head, high-strength alumina ceramic sintering, high temperature resistance, wear resistance.

The Handground hand mill is also particularly praiseworthy because its handle is designed on the side, which is more ergonomic. At the same time, the wooden part of the handle is made of old coffee trees, which has more texture.

Zassenhaus Quito hand bean grinder in Germany

Price: 699 yuan

Evaluation: the use of two-axis fixed, steel conical grinding head, is an European classic hand bean grinder brand, fixed shaft, uniform grinding, the product is very excellent, and can even grind the fineness of esp

German Comandante C40 MK3 Commander hand Bean Mill

Price: 2459 to 3980 yuan

Evaluation: high nitrogen steel grinding core, the strength is more than twice that of ordinary 304 stainless steel, and has the same corrosion resistance. Each hand mill is equipped with a powder receiving can of transparent glass and a powder storage tank of brown glass. Beautiful, many colors.

Orphan Espresso OE LIDO 3 hand bean grinder

Price: 1100 yuan

Evaluation: Lido is currently recognized as one of the most professional and best hand mills in the world. It is designed by Doug, a famous old grinder collector in the United States, and is inspired by the Italian toy "Lido". Second kill the powder quality of the electric mill below 1000 yuan (in addition to grinding the powder should be tired or tired). Swiss 48mm Seiko hard steel grinding core. Copper alloy biaxial system ensures grinding stability and powder uniformity. Easy to disassemble and clean.

Advantages and disadvantages of hand bean grinder VS

Advantages of hand bean grinder

Cheap and portable: the price of a household manual bean grinder generally costs only a few dozen yuan, while the one with better style and material costs more than 100 yuan. In the category of bean grinder, the price is the cheapest.

Shortcomings of hand bean grinder

Inefficient and laborious: the electric bean grinder can have thousands of revolutions per minute, while the hand mill can turn more than a hundred revolutions a minute. Therefore, the efficiency of hand grinding beans is still on the low side.

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