What coffee beans are used for cold extraction? What coffee beans are suitable for cold extraction?

Professional coffee knowledge exchange More coffee bean information Please pay attention to coffee workshop (Weixin Official Accounts cafe_style)

First of all, let's know what is iced coffee and what is the difference between iced coffee and iced coffee? You might wonder,"are they different?" Yeah, but it's easy to tell.

ColdBrewCoffee, English name, is ground coffee beans soaked in cold water for at least 12 hours, extracted and filtered by professional equipment. For higher body, it can also be extended to 24-48 hours.

Low temperature and long extraction time are the two characteristics of cold extraction coffee, but also the two main differences between cold extraction coffee and hot extraction coffee, hot extraction coffee is extracted by hot water coffee beans, temperature between 82-95℃, generally no more than 5 minutes. The fastest espresso is only 18-23 seconds, while cold coffee takes far longer than hot coffee. When it comes to the problem of long extraction time of cold coffee, in a more poetic way,"you drink not only a cup of coffee, but also a long wait."

experience sharing

[Ice Drops]

\ 1 /

grinding thickness

Ice coffee powder is ground a little finer than hand brew, about the size of fine sugar, as shown in the picture:

\ 2 /

extraction time

As mentioned above, the extraction time depends on how fine your coffee is ground. Under normal circumstances, the finer the grinding, the shorter the extraction time, and the coarser the extraction time, the same as when extracting with hot water.

Ice drops generally take 6-8 hours, as long as the dripping rate is controlled at 1-2 drops per second (or 7 drops for 10 seconds), 6-8 hours to complete ice drops, to achieve the best flavor, you need to put and refrigerate 1-2 days after drinking.

\ 3 /

extraction methods

When using the same beans and the same grind thickness, we found that ice drops taste better than ice extract. Personally, I think ice drops African beans (Yega, Sidamo, Kenya) taste smoother, cleaner and more fruity.

In addition, the ice drop method can eliminate the final step of filtering the coffee solution.

\ 4 /

water

Use ice cubes or water close to 0-5℃. For a better and more consistent taste of coffee, try to use filtered water.

In terms of flavor, high temperature will decompose tannic acid in coffee into pyroacetic acid, causing sour and bitter feeling. Studies have shown that cold extraction coffee has 67% less acid than hot extraction. Therefore, compared with hot extraction coffee and iced coffee after hot extraction, coffee made by cold extraction process has lower acidity and is generally welcomed by people.

In addition, low temperature conditions and long-term contact with coffee powder make it difficult to extract only small molecular flavor substances, such as flower and fruit flavors, while those with large molecular flavors, such as smoky flavor and baking flavor, are difficult to extract. That's why cold coffee doesn't smell like a sensory aroma, but it tastes smoother, richer, more layered, sweeter, and less greasy.

[Iced Coffee]

In the early days, we found that hot water extract coffee tasted good, but ice extract didn't always taste good. It took a lot of coffee beans to discover the secret. Once the coffee beans are selected, you should pay attention to more details. We found out what to pay attention to in the ice extract:

[Concentration]

Because ice extraction has ice cube factors, so usually we extract ice coffee will be more intense, usually powder water ratio 1:10, with kono filter cup, 20 grams of coffee powder, 100 grams of ice cubes, 200ml of water for extraction:

And normal hand-brewed coffee extraction, today we use Kenya AA, grinding degree small Fuji ghost teeth 3.5, 92 degrees water temperature, 40 grams of water stewed for 35 seconds, divided into 2 stages of water injection, try to extract a little more concentrated:

[Iced Coffee]

The production of cold coffee is not mysterious. Generally speaking, coffee beans are soaked in cold water below 5℃ (put in the refrigerator). The grinding degree is the same as ice drops, even a little finer.

Time in more than 12 hours, at home, or even on business can be completed outside the method.

After soaking, filter

Use the ears to make iced coffee

The base ingredient is a packet of ear-hanging coffee, preferably freshly ground coffee, preferably light roasted sun beans (sun yega, sun sidamo). The tools are stirring rods, glass bottles and cups. The steps are as follows:

1. Soak the ears in an ice-water mixture. Put it in the refrigerator at 0-5℃ for at least 12 hours, take it out (slightly lighter beans are recommended to extend the time), soak it and discard the ear bag directly to get a cup of iced coffee.

4. Or take out the coffee in the ear bag, mix it directly with ice water, put the ear filter paper on the cup like hot coffee, pour it into the coffee liquid in the glass bottle for filtration.

5. Add sugar, milk or ice according to your preference. It is recommended to taste the original taste first. The wonderful moment will open immediately!

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