The difference between iced coffee and iced coffee distinguishes "iced coffee"

There is an essential difference between ice-drop coffee and ice-cold coffee. Ice-drop (or ice-brewed) coffee and ice-cold or ice-cold coffee seem to be different in one word, but they are essentially different in extraction and cannot be treated in the same way. Ice drop (also known as ice brew) coffee is a coffee beverage extracted by soaking in water below 5 degrees Celsius for a long time at a low temperature. Iced coffee or iced coffee refers to a cold drink coffee that is quickly extracted with hot water and then added with ice or cooled rapidly.

There is a great difference between the two in the way and time of extraction.

1. Hot coffee uses hot water higher than 80 degrees Celsius or above 85 degrees Celsius, and must be extracted quickly, because slow extraction will lead to excessive extraction of coffee and lose its own flavor, resulting in miscellaneous flavors, and the main substance causing miscellaneous smell is tannin. After boiling, tannin will decompose into pyrosylic acid, and tannin is easy to dissolve and decompose in hot water, which is the main culprit for our coffee to be too bitter. So be careful not to extract too much tannin and caffeine.

2. Ice drop coffee is extracted with a temperature that must be less than 5 degrees Celsius or even close to the freezing point, so the various ingredients in the coffee are not easy to extract in ice water, so it is necessary to grind the coffee powder and extract it slowly. The specific method is to soak the coffee powder in ice water for a long time and extract it at a very slow drip rate. The standard rate is 1 drop per second, 45-50 drops per minute. It usually takes about 8-12 hours. Although it takes a long time to wait, its biggest advantage is that the tannic acid we hate most does not decompose at all in cold ice water, and caffeine decomposes a little in ice water, but it is about 90% less than hot water extraction. there are also many other major ingredients in coffee. It is precisely because there is no astringency in the iced coffee and there is little bitterness in the coffee, so the ice-brewed coffee appears to be very pure in taste, which is also a compensation for a long wait.

Through the comparison of the two kinds of analysis, you can see that the fundamental difference between hot coffee and ice drop coffee lies in the difference in extraction temperature and the content of the substance in the coffee, rather than in the cold drink or hot drink in the end, hot coffee can certainly be cold drink after ice, and ice drop (or ice brew) coffee can also be heated after heating (experts suggest that it is better to heat it through water to avoid causing foul smell by direct heating). This is why when you want to order a real Dutch ice drop coffee in a coffee shop or hotel, you not only need to book at least one day in advance, but also its price will be much higher than that of ordinary hot coffee. "who knows the liquid in the cup. Didi is hard", which is also worth paying a little more money.

It is precisely because of this that I often find baristas in some bad coffee shops or hotels who add hot coffee to ice to cool down and deceive consumers into making high profits by impersonating authentic ice-drop coffee. In fact, the difference between them is easy to distinguish, there are two ways: first, the real ice drop coffee after at least dozens of hours of full dripping and fermentation, the bottle will immediately have an unspeakable strange aroma, this is the kind of hot coffee absolutely does not have the kind of fragrance, and this aroma can not be copied in any other way, unforgettable. So when you doubt whether it is a real ice drop coffee, ask the barista to bring up the original ice drop coffee without sugar and milk and smell it first. Second, the taste and feeling, ice drop coffee does not have any astringency, very little caffeine content, taste very clean and refreshing, that is, even drinking a few cups will not have any palpitations or insomnia and other negative effects. Hot coffee with ice only lowers the temperature, but caffeine and tannin are not reduced, and there will be a significant difference in taste and feeling after drinking.