How do you drink the coffee powder? How do you cook coffee powder? Can the coffee be brewed twice?

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Many young friends, including some old people, of course. They are very strange to coffee, and whenever they talk about making coffee, they find it very difficult to understand, thinking that it is a very skilled and complex activity. The Chinese tend to generalize the production of freshly ground coffee with the word "boil". Well, for these friends, I will try my best to introduce this question to you.

First, why should coffee be "brewed"

If you know a little bit about coffee, you must know that coffee is roasted by raw beans at high temperature into the brown beans that we are all familiar with. So why can't coffee just like tea, pour these beans into a pot and boil them, or soak them for a while to make a cup of strong coffee?

We know that coffee is different from tea, it is a seed. Its density is much higher than that of tea, so it can't be eaten directly. It needs to be baked at high temperature, which is actually puffing. Because only the lignocellulosic structure of extruded coffee beans can be opened. Aromatic substances remain in crispy roasted (expanded) coffee beans. Coffee beans become larger and denser, and this process is necessary, otherwise we will not be able to get the taste of coffee (how coffee flavor is formed during roasting, which is too complex to go into detail here).

After the coffee is roasted, it needs to be crushed. The purpose of crushing is to increase the contact area between hot water and coffee powder. This will cause more aromatic substances to be extracted. We call this phenomenon increasing the extraction rate. Therefore, the whole coffee beans can not be completely extracted from the taste of coffee, so the coffee beans can not be boiled directly.

The next step is to use water to extract the taste of coffee from the coffee powder, and Jiner also has the color of coffee. So we have to drink a cup of coffee, coffee beans need to go through: puffing-crushing-extraction, can be obtained. So coffee needs to be "brewed".

Can coffee be "brewed"?

If we define "boiling" as heating water to 100 degrees and keeping it at that temperature for a long time, then coffee cannot be brewed. Because the source of flavor in coffee (aromatic oil) will be destroyed in the process of "boiling" at high temperature for a long time. Therefore, about 92 degrees Celsius is the ideal temperature for coffee extraction. So whether you are soaking (French pressure pot), or using a coffee machine, or siphon pot and other appliances, the water temperature of extracted coffee can not be higher than 96 degrees Celsius. So coffee can't be brewed in this sense.

In this way, in the production of filtered coffee, we can clearly see that the coffee should be brewed instead of being boiled like porridge. We use a variety of heat sources to heat only the water used to extract coffee, rather than directly boiling the mixture of boiling water and coffee powder (Turkish coffee is outside the scope of this discussion).

Third, why instant coffee doesn't need to be made

It can be clearly seen from the production process of instant coffee that raw coffee beans are extracted in specific containers after puffing and crushing (but instant coffee is called extraction in this process) into concentrate, filtered, and then dried in two forms, which is why instant coffee is divided into hot-dried instant powder and freeze-dried instant powder. At present, the vast majority of instant coffee in the domestic market is hot and dry instant powder. But in any case, the solid powder we get is exactly the solid soluble substance of coffee. The wood fiber (coffee grounds) of the crushed coffee beans has been filtered out after the preparation of the extract. So instant coffee doesn't need to be brewed. Because the solid soluble substance of coffee is easily dissolved in water.

But freshly ground coffee we need to filter out the coffee grounds after the coffee is extracted.

Fourth, freshly ground coffee can be "brewed" several times

Many friends often complain that coffee is more expensive than tea, because tea can be brewed repeatedly, but coffee can only be brewed once. There are also some friends who do not give up and extract the coffee many times. We say that this coffee can only be extracted once, but the coffee brewed after the first time can no longer be called coffee. Because there is a lot of caffeine in the brown water, or some scorched substances. We call this brown water Dirty Water. In fact, the standard method of drinking black tea in the West is only soaked once.

After many friends began to make their own coffee, they couldn't help but wonder, what are the secrets of making coffee well? In fact, it is not difficult to make coffee at all! As long as you master the following tips, you will be an enviable coffee expert in the eyes of your friends and relatives!

First, choose your favorite coffee brewing method.

Don't care what others say, as long as you use it easily, cook it easily, and drink happily, it is the most suitable way for you to make coffee. Some people like to brew coffee in a convenient and fast American coffee pot, some prefer the romantic elegance of siphon coffee, while others prefer the simplicity and purity of French pressure, the Italian style of mocha pot, or the flavor of hand-brewed coffee. In any case, the brewing method that is suitable for others may not be the best for you, choose the coffee brewing method that suits you best and best. It is the first condition to enjoy the pleasure of brewing coffee in DIY.

Second, only buy "freshly roasted" coffee beans with "baking date marked".

"Coffee beans are fresh food" is a very popular concept in foreign countries. Fresh roasting is the life of a good cup of coffee! Freshly roasted coffee beans retain the most fragrant and charming coffee flavor, can easily make a cup of the most mellow coffee; stale coffee bean flavor has long been lost, can only boil a cup of bitter black water that is not mellow enough and may even be out of tune. If you don't buy baked bread that was baked a month ago, from now on, refuse to buy "stale" coffee beans / coffee powder that are not clearly marked with a baking date or have been roasted for more than seven days.

Third, brew coffee with "good water"

More than 98% of the ingredients in a cup of coffee are "water". The importance of water is beyond doubt! If you use bad water to brew coffee, even the best beans will be in vain-because bad water can destroy the best coffee. Even a simple "filter kettle" can filter out many bad substances for "tap water", making the brewed coffee more fragrant, strong and mellow. Like making tea, you need to avoid using distilled water, and if the tap water in your place is of poor quality, using clean mountain spring water is also an ideal way.

Fourth, put enough coffee

Coffee beans must be used in sufficient portions. Too little coffee powder may lead to bitterness or insipidity, but not too much at a time. The standard amount of coffee is: use "two flat spoons" (about 15g) coffee beans (powder) to brew "one cup" (about 180cc) coffee. Please adjust your coffee use according to this proportion.

5. Appropriate water temperature

Generally speaking, the most suitable water temperature for brewing coffee is between 88 and 94 degrees Celsius. Avoid using boiling hot water to brew coffee. Let the water boil and let it sit for 1-2 minutes before making coffee.

Keep coffee equipment clean at all times

Never bring the concept of "raising a pot" of tea to coffee utensils! Every time you use a coffee utensil, you need to clean it immediately and keep it clean and dry in a ventilated place. if you apply the concept of "raising a pot" to the coffee utensil, you will get a cup of bad coffee full of strange oil smell.

Make coffee and drink it within ten minutes

Don't believe that your coffee can be kept warm for more than half a day on the "electric heat preservation tray" of the coffee pot! The longer the coffee is laid aside, the flavor will gradually fade away and the taste will go away quietly. After the coffee is made and finished in ten minutes, he is the expert who knows how to do it.