How long does it take to drink freshly baked coffee beans? Will freshly baked coffee beans produce oil?

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Friends who like to make their own coffee at home, if you pay close attention to it, you will find that there is a layer of "grease" on the surface of some freshly baked coffee beans, which many friends call coffee oil.

● coffee beans also contain oil like other seeds such as corn and soybeans. The oil on the surface of coffee beans is a water-soluble organic substance that looks like oils and oils that contain the aroma of coffee.

The appearance of dark brown deep-baked beans shows a slight glossy appearance after baking, and a large amount of oil begins to emerge from the surface about three to five days after baking.

The oily deep-baked beans do not mean that they are not fresh. On the contrary, after a month of baking, the outer fat of the deep-baked beans will return to the inside of the coffee beans, resulting in an unpleasant flavor. So seeing a deep-baked coffee bean coming out of oil doesn't mean it's not fresh.

Basically, shallow baked beans will not produce oil, so they will not produce oil even if they are kept for three months, so shallow baked beans cannot be used to tell whether they are fresh or not. While the light and medium roasting begins to produce oil slightly in about a month and a half, it can also be judged that the medium and light roasted coffee beans are not very fresh.

● so, how can we ensure that freshly baked coffee beans remain fresh for a certain period of time?

As the flavor of coffee is very unstable, it is easily affected by light, temperature, humidity, oxygen and other factors. Roasted coffee is easy to oxidize if it is exposed to the air for a long time, and the oxidation reaction is an important reason for the deterioration of coffee.

Roasted coffee contains about 10-15% fat, 50% linoleic acid, linoleic acid can be automatically oxidized to hexanal, the longer exposed to the air, hexaldehyde will be oxidized into volatile substances, resulting in poor quality, resulting in a decline in the taste of coffee.

At present, when buying beans on the market, the packaging is a single air valve opaque aluminum foil sealing bag, and each valve is only out of air, not in the design, so the carbon dioxide produced when the beans are ripe will be discharged, and the oxygen can not get in. At the same time, aluminum foil is opaque and has good moisture resistance. As long as the packing is kept in a dry and cool place, there will be no big problem.

Some coffee bags do not have sealing strips, so we need to buy sealing cans after we unpack them, which is recommended by small in.

This coffee can is divided into 200ml 500ml and 1L package, the market price is about 15 to 20 yuan each, the price is cheap, the sealing is good.

Press the red button above, you can vent the air in the sealed jar, effectively prevent the air from entering, and prolong the oxidation time of coffee beans. After the small in test, the coffee beans can be stored in a dark place without contact with light in this sealed jar, and the coffee beans can be kept fresh for more than a month.

In fact, no matter how good the sealing effect is, it is better to finish the coffee beans as soon as possible. Both deep-roasted and light-roasted coffee beans will have the best taste period, so drinking up the beans as soon as possible is the right solution.

No matter how perfectly preserved, there is no way to keep the beans in a state of the best flavor for a long time, which will only make the coffee beans less and less fresh, so it is not recommended to buy a lot of coffee beans at one time.

Brand recommendation of ● freshly baked coffee beans

Qianjie coffee roasted single freshly baked coffee beans: Yega Chuefei Coffee, Kenya AA Coffee, Panamanian Flower Butterfly Coffee, etc., are fully guaranteed in brand and quality, suitable for all kinds of utensils. And more importantly, the performance-to-price ratio is extremely high, a pack of half a pound 227 grams, the price is only 80-90 yuan. According to the calculation of 15 grams of powder per cup of hand-brewed coffee, 15 cups of coffee can be made in a bag, and each cup of coffee costs only about 6 yuan, which is very cost-effective for coffee shops to sell dozens of yuan a cup.

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