Recently, my friend asked me, is it good to drink instant coffee?
Since I started playing with hand-brewing coffee, I have hardly ever drunk instant coffee. I have always recommended that I drink hand-brewing, so I should not drink instant coffee. But this answer seems a bit too perfunctory now, so after learning some relevant knowledge, I will answer this question seriously:
Instant coffee can be drunk, but there are choices.
1. What is instant coffee
Instant coffee is different from freshly ground coffee, that is, hand-brewed coffee. It is concentrated and dried by industrial equipment after the cooked beans are ground and extracted, and the effective flavor substances are extracted under special pressure and temperature, and the instant coffee powder is finally obtained.
In fact, the production of instant coffee is very complicated, much more complicated than getting a cup of freshly ground coffee. It can be said to be one of the important achievements of scientific and technological progress in the food industry in the 20th century.
2. How to choose instant coffee
Instant coffee can be divided into two types from the production process, one is spray-drying instant coffee, and the other is freeze-dried dehydration instant coffee. What is the difference between these two types of coffee? Let’s take a look.
Spray-drying instant coffee
This is a very common traditional process and very efficient. Simply put, this method is to put the coffee condensed liquid into a high-temperature jet and then spray it. The moisture in the sprayed coffee liquid will be evaporated, leaving behind small dry particles, that is, the crystals of coffee extract, which can be said to be the essence of coffee.
But there is a problem, this problem is actually quite serious. Although this method is particularly efficient, the flavored substances in the coffee will also evaporate and dissipate in a high temperature environment. That is to say, the final coffee granules have no flavor, and in order to make up for this shortcoming, it is necessary to supplement through industrial means. To be honest, spray-dried instant coffee can be said to be semi-industrial coffee.
freeze-dried dehydrated instant coffee
This instant coffee will have a more technical content. It uses the thermodynamic phase equilibrium theory, which is the water three-phase point. You should know that when water is at a certain temperature and pressure, the three states of gas, liquid and solid will coexist. At this time, reducing the pressure and supplying heat appropriately can sublimate the solid water into water vapor to dissipate. Freeze-dried instant coffee is made using this principle.
Place the coffee concentrate in a three-phase point state, and change the environmental pressure and heat it, so that the moisture in the solid coffee liquid can be sublimated and dissipated, and finally obtain granular freeze-dried coffee powder. The biggest advantage of this method is that it can retain the aromatic substances of coffee. Not only that, when the water vapor sublimates and dissipates, it can further dissolve coffee powder in the fine gaps left inside the coffee powder particles, thereby improving the quality of instant coffee powder.
From this process, freeze-dried instant coffee can be said to be a relatively pure coffee. This is why in 1965, Nestle launched "Nestle Gold Medal Coffee" and it was the first time that it used the instant coffee made by freeze-drying, and this is the first time that such technology is used.
To sum up, can instant coffee be drunk? is of course that you can drink. But when you drink it again, you need to have a choice. If possible, it is best to choose freeze-dried instant coffee. However, the price of freeze-dried instant coffee is not that affordable, after all, the technology is there. Therefore, under the same conditions, I would still recommend drinking hand-made coffee, which is just ground coffee. After all, this kind of coffee is fun and fun, and it is a soul-stuffed way to play.
✦ written at the end
In addition, we have to mention "three-in-one coffee".
Many friends say that coffee is bitter, so they like to buy three-in-one instant coffee. After all, three-in-one instant coffee feels closer to Italian milk coffee, which is understandable. However, if you are a friend who cares about your health and whether you gain weight or not, it is recommended not to drink this instant coffee.
The so-called three-in-one, that is, a mixture of sugar, plant fat powder , and instant coffee powder. It goes without saying that sugar can easily make people gain weight. What is fat powder? It is commonly known as "creamel", which is a food additive made of high-temperature hydrogenation and drying of refined vegetable oil. During the hydrogenation process, this substance can easily cause changes in vegetable oil , producing excessive trans fatty acid , affecting cardiovascular health.
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