What is cold brew coffee? What are the extraction principles of cold brewed coffee and iced coffee?

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Iced American coffee and cold extracted coffee can be said to be two hot sellers in summer coffee shops, but there is a great difference in price, and the price of cold American coffee is usually twice that of iced American coffee. It's also iced coffee. Why is cold coffee so expensive? In this article, we will follow Qianjie Coffee to learn about this popular style.

What is cold coffee?

Unlike most American coffee brewing methods, cold-extracted coffee is soaked in water at room temperature or below. Qianjie Coffee usually adds the coffee powder of moderately ground coffee (white granulated sugar thickness / 75% of China 20 standard sieve) to cold water, then seals it into the refrigerator freezer, soaks in low temperature for 8-12 hours, and filters out the dregs.

Long extraction time is the characteristic of cold-extracted coffee. Because there is no movement of hot molecules, it takes longer to extract than at higher temperatures. This is because water molecules have less kinetic energy at lower temperatures, so cold-extracted coffee takes a long time to soak in order to solve this problem.

Due to the long brewing time, cold extracted coffee usually contains more total dissolved solids (TDS) than espresso (such as American coffee) or filtered coffee (such as hand brewed coffee). This means that cold-extracted coffee contains more caffeine and higher concentrations than other extracted coffee drinks. As a result, many friends will dilute it with water or milk when tasting cold coffee.

It is also important to note that cold-extracted coffee is different from iced coffee. In some coffee shops, the two words are interchangeable, but the two drinks are made differently. Generally speaking, iced coffee is brewed in heat, then cooled quickly and drunk with ice.

Why is cold coffee more expensive than iced American coffee?

One is the cost of time. Iced American coffee is made by diluting an appropriate amount of water after espresso extraction is completed. Espresso is made by grinding coffee powder into very fine particles and pressurizing 9-10bar to let hot water about 94 degrees Celsius quickly pass through the coffee powder layer in 25-30 seconds at the same time.

One is the cost of using coffee beans. Most stores produce espresso drinks, which are usually made with blended coffee beans in order to make the products more stable for a longer time. Blending coffee beans have used the characteristics of coffee beans from different producing areas, to learn from each other in a way that is more suitable for pressurized extraction can also show a balanced and mellow taste.

The production of cold-extracted coffee is to reflect the unique flavor of coffee beans, so they are usually made of single-product coffee beans. The cost of individual coffee beans is higher than that of blending coffee beans.

Recommended coffee beans suitable for cold extraction

Making cold coffee can bring out the original taste of coffee beans, so Qianjie coffee recommends using freshly roasted beans from a single origin. You can place an order at Qianjie Coffee flagship store, and all coffee beans will be sent out within 5 days after baking.

For those who want cold coffee with a sweet and sour taste like fruit, you can try "Qianjie-Ethiopian Sidamo Fakui Coffee beans". The flavor is citrus, berries, red flowers and black tea.

For those with mild sour taste and mild fruit fermentation, try "Qianjie-Costa Mozart Coffee beans", which are characterized by raisins, sweet-scented osmanthus, honey and nuts.

If you want something completely sour and full-bodied, you can try "Qianjie-Brazilian Queen Manor Coffee beans". The flavor is roasted peanuts, creamy smoothness, dark chocolate and sugar.