What is Flash brew? The difference between flash coffee and cold coffee ice drop coffee ice hand brewed coffee

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There are many ways to make iced coffee, such as cold extracted coffee and iced coffee, but these two methods take a long time, between 8 and 12 hours on average, and there is one way to extract iced coffee in a few minutes, which is flash coffee.

Is cold extract coffee the same as ice drop coffee?

First, let's talk about cold extract coffee and ice drop coffee, these two kinds of iced coffee are more common ways to make iced coffee, as long as in summer, many cafes will launch these two kinds of products.

However, there is a substantial and obvious difference between the two coffee production methods. Cold extraction coffee is immersion extraction, ice drop coffee is trickling extraction, of course, the common point of these two kinds of coffee is the use of ice water for extraction, the extraction efficiency is very low, and it takes a long time to make.

The way of making ice drop coffee

Generally, ice drop coffee is made through an ice drop kettle, which is divided into the upper pot (ice water), the middle pot (coffee powder) and the lower pot (coffee liquid). From the ice water in the upper pot into the coffee powder in the middle pot drop by drop, the coffee liquid is slowly extracted and flowed into the lower pot, usually for 6-8 hours.

The ice drop scheme in front street is to use 60 grams of coffee powder and extract 600 milliliters of coffee liquid. The ratio of powder to liquid is 1:10. The flow rate of water droplets is about 3 drops in 10 seconds, and the ice-water mixture is used as the water source of the pot. The extraction time is about 8 hours. After extraction, put the coffee liquid into a sealed bottle and put it in the refrigerator for 24 hours.

Cold extraction coffee making method

Cold extract coffee is to use a container, put the ground coffee powder into the container, and then add the corresponding proportion of cold (ice) water, shake evenly and seal. Store in low temperature (refrigerator) for 12-24 hours and extract at low temperature. Then filter the coffee grounds with filter paper to get cold-extracted coffee.

The cold extraction solution on Qianjie is to use 50g coffee powder, first pour the coffee powder, then add 400ml of normal temperature water and 200g hard ice cubes (a total of 600g ice-water mixture) to the bottle, the ratio of powder to water is 1:12, then use a mixing stick to stir the coffee powder and water, then seal in the freezer.

After 12-24 hours in the refrigerator, use filter paper to filter out the coffee grounds to get a clean coffee liquid, then use a clean sealed bottle to put the coffee liquid in a clean bottle and refrigerate it for about 4 hours before drinking.

What is the difference in flavor between the two?

Because ice drop coffee is extracted with ice water for a long time, more small molecules (such as flower aroma, acid) are extracted, while macromolecules (such as the bitterness of tannin) are more difficult to extract. In addition, after the production is completed, it will be fermented at a low temperature for 12 hours, so there is an obvious sense of fermentation in the flavor and the sweetness of the coffee bean itself, and the taste will be cool and delicious.

Cold coffee shows that the liquid is not as clear as ice drop coffee, the surface will also float a thin layer of oil, in flavor and taste compared to ice drop coffee will appear slightly thick and balanced.

What is sparkling coffee?

Now that we know the difference between cold coffee and iced coffee, let's take a look at what is flash coffee. Flash coffee, also known as Flash brew, is a classic Japanese iced coffee production process, which not only retains the traditional hot coffee production technology, but also brings the advantages of cold extract (Cold brew) coffee, so it is warmly sought after by coffee lovers in Japan.

Flash coffee is a cold drink coffee made by rapidly extracting coffee powder with hot water, then adding ice or rapidly cooling, which belongs to the hot extraction method. This process makes hot coffee cool in a very short time, can effectively "lock" the aroma components produced during hot coffee extraction, while minimizing the occurrence of oxidation reaction, giving coffee excellent flavor.

To avoid diluting the taste of coffee with ice cubes, iced coffee will reduce the powder-to-water ratio when brewing, brew it with less water to get a cup of coffee liquid with a higher concentration, and then cool it with ice cubes.

The method of making flash coffee in front street coffee is to take 15 grams of coffee powder as an example, the degree of grinding will be finer than that of hot hand, for example, the grinding degree of light-roasted coffee is 80% through the No. 20 screen, then the degree of grinding is 85% through the No. 20 screen. The ratio of coffee powder to water and ice was 1:10:5, and the water temperature was the same as that of hot hand brewing. The water temperature of light roasted coffee was 90-93 ℃, and that of medium-deep roasted coffee was 87-89 ℃. After brewing, shake or stir the filter cup so that the ice is in full contact with the coffee liquid, cooling quickly and keeping the concentration consistent.

What are the characteristics of sparkling coffee?

The most important feature of flash coffee is that it can make a cold and refreshing cup of iced coffee in a few minutes, which greatly reduces the time cost for ice droplets. But flash coffee is essentially extracted from the middle and front of the coffee, and then cooled and diluted to the right temperature concentration with equal proportion of ice cubes. Therefore, it will be clean and refreshing in the taste, and it is easy to highlight the main flavor of coffee.

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