How to make cold coffee? how to make cold coffee without a refrigerator? how long can cold coffee be kept at room temperature?

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It sounds very old-fashioned, but this summer is really hot! There are many ways to fight against the hot summer. In the coffee industry, the best solution, of course, is the cold-soaked coffee Cold Brew, which is so red and purple in recent years.

With the popularity of cold coffee, you can drink it in all the coffee shops in the streets recently, even Starbucks Cold-brewed coffee is actually the "cold-brewed tea" in coffee. It has fresh aroma, fresh taste and relatively low caffeine, so it is not a problem to pour a large pot in summer. The only problem is that the cold-brewed coffee sold in the market is not cheap because of its long process and waiting time, so it really hurts the purse to have a pot from time to time. Our Wenqing Coffee King Blue Bottle recently announced the secret of Cold Brew production taught by Kevin Thaxton, the quality control manager of his Tokyo store. As long as you buy a bag of coffee beans and go home, you can make a big pot of cold coffee Cold Brew.

1. Make good use of beans

"We humbly recommend our own Blue bottle coffee beans. They are suitable for hot soaking and cold soaking." The manager, as a blue bottle man, of course sells melons for his own product Lao Wang, just refer to them; but it is necessary to choose beans for cold soaked coffee, because the flavor and aroma in the coffee powder will be magnified under the low temperature extraction for a long time, and the relative miscellaneous flavor, astringent taste and unpleasant taste in most coffee will also become stronger, so please be careful to choose coffee beans with clean flavor and uncomplex aroma, which is easier to succeed.

two。 The ratio of coffee to water

Add 55 grams of coffee to every 700 milliliters of water, which is the recommended gold ratio for the blue bottle after many tests.

3. Correct grinding degree

If the grinding is relatively rough, the concentration can be reduced; if the grinding is relatively meticulous, the degree of extraction will be higher, the concentration will be higher, and the freezing time can be shortened and can be adjusted freely.

However, the only problem is that if it is ground too fine, it will cause the problem of fine powder precipitation of coffee grounds, which will have to be filtered several times before it can be imported.

The picture says: on the right is the limited edition cold bubble coffee bottle launched by Blue Bittle and Japanese brand Hario.

4. Use filtered water

It sounds like crap, but it's the key to the taste of cold coffee.

Kevin said that water accounts for more than 98% of iced coffee, and if there is any smell in the water, the coffee is definitely not good, so using filtered water (pure water) is the easiest way to remove these bad flavors and helps to highlight the taste of coffee.

5. Storage time

Generally speaking, the soaking time of cold-soaked coffee Cold Brew is 8-12 hours, but it is important to note that after this time, even if put in the refrigerator, the flavor of the coffee will disintegrate over time, making the whole bottle taste gradually lose taste. To put it simply, cold coffee must be drunk while it is fresh, preferring to make a small amount of coffee many times rather than too much at a time. Cold coffee can be soaked overnight without a refrigerator. I prefer the clean taste of cold extraction, but it takes longer to soak and has more caffeine.