Is the coffee rich in oil really delicious? How to grind coffee beans with more grease?

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Some cheap and shoddy coffee beans still produce good oil when they are fresh. on the contrary, if a light-roasted high-quality coffee bean is extracted and shows a golden and thin fat, it does not mean that this cup of coffee tastes bad.

● CREMA

Coffee oil is one of the most prominent features of espresso. When coffee is extracted under pressure and temperature, carbon dioxide produced by photosynthesis in coffee cells will be released.

A fine layer of foam is formed on the surface of coffee, which is what we call coffee oil.

"the color ranges from hazelnut to dark brown, with a few strands of yellowish brown interspersed with extremely fine texture." this is the ultimate Italian pursuit of the fat of traditional espresso.

Significance of Coffee Oil

Are ● coffee beans fresh?

You can judge by looking at the changes in grease. With fresh coffee beans, when the coffee is first extracted, the whole cup looks greasy. Only when the extraction is stopped will the coffee liquid and oil be divided into two clear parts.

The degree of coffee extracted by ●

The darker the coffee oil is, the less bright the color is, and the color is close to black or there are black spots, indicating that Espresso has the possibility of extraction.

However, the lighter the oil of coffee, the feeling of light golden yellow, and the flow rate of coffee is too fast, indicating that Espresso may tend to lack of extraction.

Uniformity of ● extraction

If the flow rate and color of Crema are relatively stable, the color is bright and shows hazel or ochre red, and the texture is thick, it means that the probability of channel problems in the extraction process is lower, and the extraction state of this cup of coffee is better.

How ● Coffee Oil affects Coffee Flavor

Espresso will taste sour if it is kept for too long. There are many chemicals that cause the sour taste of coffee, mainly hydroxy acid.

Internal fat is one of the thousands of chemicals in coffee, which will be hydrolyzed after contact with water to form hydroxy acid.

To put it simply, if there is no oil, espresso will lose its aroma and better taste in a short period of time, the balance of taste will be destroyed, and the sour taste will increase.

Brand recommendation of coffee beans with lots of ● oil

Located in Dongshankou, Yuexiu District, Guangzhou, Qianjie Coffee freshly roasted Italian blended coffee beans are fully guaranteed in brand and quality, and the amount of fat is good, so it is suitable for making fancy coffee and lace coffee. And more importantly, the performance-to-price ratio is extremely high. Take the commercially recommended style of commercial blended coffee beans as an example, a pack of 454 grams, the price is only about 60 yuan. According to the calculation of 10 grams of powder for a single cup of espresso, a packet can make 45 cups of coffee, which costs less than 1.5 yuan per cup. Even if you use two heads per cup of espresso and 20 grams of powder per serving, the price of a cup of double espresso concentrate is no more than 3 yuan. Compared with the price of hundreds of yuan a pack sold by a well-known brand, it can be described as a conscience recommendation.

Qianjie coffee: Guangzhou bakery, the store is small but a variety of beans, you can find a variety of unknown beans, but also provide online store services. Https://shop104210103.taobao.com