Iced Coffee and Cold-brewed Coffee in practical Teaching

One, ice drop coffee, cold bubble coffee actual combat teaching!

What is iced coffee?

② The difference between ice, cold foam and ice drops?

How is ice coffee extracted?

How to make iced coffee at home?

5 Ice Drop Appreciation

01

What is iced coffee?

Iced water-drip coffee is also known as Dutch coffee. It is said that during the Dutch rule in Indonesia, they planted a lot of heavy robersta coffee. In order to drink these rather bitter coffee beans in the tropics, they invented a special device for brewing coffee with slowly dripping cold water.

One interesting thing is that you can hardly find this coffee in the Netherlands, but it has caused an ice storm in Asia. In Japan, iced coffee has a history of hundreds of years, so iced coffee is also known as "Kyoto coffee"(Kyoto coffee),"Japanese-style slow-drip"(Japanese slow drip). In South Korea, almost every cafe sells iced coffee, and many famous brands of ice drop appliances are also from Japan and South Korea. In China, some boutique cafes are starting to sell ice drops. Next time you go to a cafe, remember to ask the barista.

02

The difference between ice, cold foam and ice drops

Made by thermal extraction

Ice coffee refers to cold coffee that is quickly extracted with hot water and then added with ice or cooled rapidly. It takes about 2 to 3 minutes to make.

Made by cold extraction

Cold Brew refers to coffee extracted by long-term cold steeping of coffee powder in cold water below 5 ° C, which takes about 8 - 12 hours. Also known as iced coffee.

Water-drip coffee refers to coffee that uses drops of cold water at a constant rate to extract flavor substances from coffee powder, which takes about 4 to 8 hours, depending on the size of the equipment.

It should be noted here that iced coffee is to lower the temperature of hot coffee, which is far less delicious than cold bubbles and ice drops.

Cold coffee and ice coffee are coffee extracted with cold water, compared to coffee extracted with hot water, can retain the flavor and aroma of coffee to the greatest extent, while softening the sour feeling and bitterness, because cold coffee brewing is not easy to oxidize, it can also inhibit the appearance of sour taste. The acidic fats in coffee are not easily dissolved in cold water.

03

Extraction of iced coffee

① Basic principles

The key to making iced coffee lies in "cold" and "slow". The ice water in the container at the top of the equipment is controlled by the valve to soak the coffee powder drop by drop. The coffee liquid is filtered once and gradually collected in the pot at the bottom. The whole extraction process takes about half a day.

② Extraction secret

Water powder ratio: The ratio of coffee powder to ice is about 1:10~12, which can be determined according to personal preference.

Grinding: It is recommended to grind the coffee powder to a fine level to increase the contact area between the coffee powder and the water.

Bean selection: recommended taste more balanced dark roast coffee beans.

Water speed: 2 drops in 3 seconds (40 drops per minute) is the best slow filtration.

So the question is, what does the device for making ice drops look like?

In fact, as long as it contains the following four elements, it can be called an ice drip pot.

① A container that holds water and ice cubes and can adjust the speed of water droplets.

2. Containers for coffee powder.

③ Filter: Paper, cloth or metal can be used.

4. Containers for coffee solution.