What is the difference between ice-brewed coffee and cold-extracted coffee? how long can ice droplets of cold-soaked coffee be kept in the refrigerator?

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introduction

Qianjie recently saw a discussion about "what's the difference between iced coffee and cold coffee," and then some of the following replies said there was no difference, some joked,"coffee made from my hand, I say what it is!" Haha ~ Hardcore! So is there a difference?

What is iced coffee?

Ice brewed coffee is actually ice drop coffee ~ ice brewed coffee means using ice water mixture below 1℃ for drip extraction of coffee powder. Common ice coffee pot is divided into three parts, the upper pot is used to hold ice water mixture, some will have a valve to adjust the dripping speed, some through the original design to set the dripping speed; the middle pot is used to hold coffee powder; the lower pot is used to store the extracted coffee liquid.

Ice Brew/Ice Drop Coffee Extraction Time

Due to the low temperature of the ice-water mixture and the drip filtration method, the release rate of flavor substances in coffee powder will be slow, and bitter and miscellaneous tastes will be difficult to release. In order to ensure that the sweet and sour flavor of coffee can be fully extracted, the ice water dripping speed should be 4 drops in 10 seconds, and the total extraction time should be 4-8 hours.

After the extraction is completed, you can't drink it immediately. At this time, the coffee has no taste and needs to be sealed and left in the refrigerator for more than 8 hours. The sealing process produces carbon dioxide, which creates pressure that allows coffee flavor molecules to better express themselves (alcoholization process). Ice drop coffee overall shows a light feeling, can be said to be clean and fresh without impurities, aroma is full of love ~

What is cold coffee?

Cold extraction coffee is also known as cold brew coffee. After pouring cold water into the coffee powder, it is soaked and extracted. The cold brew method can amplify various flavors and aromas of coffee, reduce acidity and improve the overall mellow degree of coffee. Cold coffee making equipment is very simple, just need a container with a lid and filter tools, whether at home or office can be made at any time.

Should cold coffee be extracted at room temperature or in the refrigerator?

Both are possible, but the extraction time will vary. Cold coffee at room temperature is recommended to soak for no more than 8 hours, while cold coffee at low temperatures is recommended to soak for 12-24 hours.

Cold coffee extraction at room temperature will vary with the room temperature, and the extraction time will also vary. Soaked coffee at room temperature can immediately show a mellow feeling after extraction, the disadvantage is that if the extraction time is not the coffee powder's mind, it will release a woody taste to you "demonstration".

The advantage of putting the refrigerator is that it can soak the mellow feeling, and the woody taste is not easy to appear. The disadvantage is that the time is really long. Although low-temperature extraction is not easy to extract the impurities and bitterness in coffee beans, it is still a long extraction time. In order to avoid the coffee liquid after extraction is too rich, it is recommended to adjust the grinding degree slightly.

How long can iced coffee and cold coffee last?

Ice Brew/Ice Drop Coffee can be stored in a refrigerator for 3 days after extraction. As time passes, the flavor of the iced coffee after three days will weaken and the taste will be very weak.

Cold-extracted coffee, on the other hand, can be refrigerated for up to five days after filtration. Although it is said that the longer the cold-extracted coffee is placed, the more mellow the flavor will be, after all, the refrigerator environment is "complex"(especially the household refrigerator), and it is difficult to avoid the invasion of bacteria. So I really don't recommend drinking it for a week or even a month.

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