How to brew freshly ground coffee beans to highlight the flavor of coffee? how can freshly ground coffee taste good?

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We are often asked a question: I like coffee, too, but do I want to buy coffee beans or coffee powder? Our answer is: please try to buy coffee beans, and then equipped with a bean grinder (electric or manual), and then grind it just before cooking! One of the simplest reasons is: freshly ground coffee tastes better! When the coffee beans are ground into coffee powder, the area of contact with the air becomes larger, and the aroma substances are more easily dispersed. The coffee brewed after grinding is different from the coffee brewed after grinding and placing for 10 minutes. The aroma and flavor are not the same, not to mention the coffee powder ground and placed for a certain period of time!

There is also the question of preservation time. Coffee beans last longer than powdered coffee. By longer preservation, we don't mean that the shelf life is longer, but that the fragrance and mellow taste stay longer. Coffee beans are afraid of light and water, but what they fear most is oxygen. After roasting, coffee beans will produce carbon dioxide inside and outside the cells, forming a protective layer and isolating oxygen. With the passage of time, carbon dioxide will gradually lose, and the protective layer will no longer exist.

In the process of grinding coffee beans, about 70% of the carbon dioxide will dissipate. The remaining 30% of carbon dioxide also volatilizes several times faster than unground coffee beans. Carbon dioxide can prevent the deterioration of the environment (moisture, oxygen) around coffee beans. If it is ground into powder, the effect will be much lower. Carbon dioxide volatilization also takes away part of the aroma of coffee. So the smell of coffee powder is not as good as coffee beans.

Coffee beans are usually packed in a bag with a single exhaust valve. after baking, the beans can be stored for two weeks, and after two weeks, the flavor begins to empty. Beans used for Italian concentrate can maintain the best flavor for a month. So for those of you who like coffee, if you drink it yourself, buy two and a half pounds (1 pound = 454g) of beans with different flavors at a time, and finish them as soon as possible.

Once the coffee is ground, the aroma disappears much faster than beans in the powdered state, so try to brew it within five to ten minutes after grinding to ensure a better flavor.

Filter cup: V60

Water temperature: 90 ℃

Powder weight: 15g

Degree of grinding: BG 5R (pass rate of Chinese standard No. 20 screen 58%)

Powder / water ratio: 1:15

Washing and cooking technique

1. Steam 30 grams of water for 30 seconds. When you see the surface of coffee powder change from wet to dry, it means that the steaming is over.

2. Use a small water flow to slowly inject water around the center to 120 grams, and let the coffee powder soak slightly to make the extraction more uniform.

3. When the water level drops 2 to 3, use the flood flow to flush to the end of 225 grams, so as not to extract the bad taste of the tail section.

For friends who want to try segmented extraction, the most disturbing thing must be when to stop and when to re-inject water.

We can determine when to segment according to the roasting degree of brewing coffee and the rising state of the liquid level during extraction.

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