If you love coffee, here are eight little coffee facts you must know!

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In the past, I loved drinking coffee, but now I have begun to understand how to drink coffee. Do you drink the right coffee? Today, I will tell you some coffee tips that you must know!

Tip 1-One-way exhaust valve, not the scent hole

Hey, have you ever had this experience: when buying coffee beans in a store or supermarket, you can't help but squeeze the package with your hands, then sniff through the hole on the coffee bean package, and say "Wow - this coffee smells so good" while squeezing? The editor would like to remind you that this is actually a wrong demonstration and will affect the flavor of the coffee beans!

The one-way exhaust valve allows the gas in the bag to only go out but not in. The carbon dioxide emitted by the roasted coffee beans will squeeze out the air inside and slow down the oxidation of the coffee beans. So, next time, don't use the one-way exhaust valve as a smelling hole and kill the beans inside.

Tip 2- Should coffee beans be kept in the refrigerator?

Where do the coffee beans you bought or haven't finished drinking live? Does anyone's coffee beans live in the refrigerator? If you still have them in the refrigerator, I remind you to help them move to a new home!

Coffee is very afraid of moisture, oxygen, light and heat. When it is stored in the refrigerator and taken out, condensation will occur due to the large temperature difference, and it is easy to absorb the odor of the refrigerator and destroy the flavor of the coffee. Therefore, it is recommended that after opening, the unfinished coffee beans should be directly sealed in a coffee bag or sealed can, placed in a cool and dry place at home, and consumed as soon as possible within one month!

Tip 3-Have you ever had fresh coffee? How long can coffee beans be kept?

Generally speaking, food products are considered to have a shelf life and a tasting period. Coffee beans are a food product. Some large coffee factories use central roasting to mass-produce coffee beans. The shelf life is usually between 12 and 18 months. However, the shelf life and freshness are two different things. In fact, the best-tasting period is what matters for coffee beans. The fresher the coffee beans, the better the coffee will taste.

After unpacking the coffee beans, it is recommended to consume them within one month. The best way to taste them is to grind as much as you want, because once the coffee beans are ground into powder, their flavor and taste will decay quickly. Therefore, the best way to preserve them is to drink them quickly!

Tip 4 – Why do I have palpitations and can’t sleep after drinking coffee?

In addition to being related to personal constitution, the caffeine content is actually closely related to the type of coffee beans. Generally speaking, the cost of Robusta beans is lower than that of Arabica beans, so most canned coffees on the market use or mix Robusta beans. However, those who are worried about excessive caffeine intake should be careful - although Robusta beans are cheap, the caffeine content is three times that of Arabica beans!

So if you are worried that drinking coffee will make you unable to sleep or cause palpitations, in addition to choosing coffee made from high-quality Arabica beans, we would also like to remind you that if the coffee powder is soaked in water for too long or the coffee powder is too fine, excessive caffeine will be extracted!

Tip 5- How many beans are needed to make a cup of coffee?

The most objective way is to use a scale. Here is a little secret for delicious coffee: 15 grams of coffee powder with 225 grams of water, and then adjust it slightly according to personal taste. Another little secret: lightly roasted coffee can add a little more water, on the contrary, dark roasted coffee can be reduced.

Tip 6 – What kind of coffee do you like?

Coffee beans themselves are seeds that grow inside fruits on trees. Just like fruits, they have a sour taste. A cup of freshly roasted good coffee will have a rich and balanced taste of sour, sweet and bitter.

There are two types of coffee acidity. Fresh and properly roasted coffee beans will have a layered acidity like red wine, with a hint of sweetness. If the coffee beans are not fresh or over-extracted, they will have a corrupted acidity or an unpleasant acidity on the tongue.

Tip 7 – Best flavor: roasting degree and water temperature

When brewing coffee, the temperature of the hot water should be changed depending on the extraction tools used and the degree of roasting of the coffee, so that you can drink the best flavor of each coffee bean!

For beans of different roasting degrees and different extraction tools, the water temperature should be adjusted between 85℃ and 95℃ (except for cold brew coffee). Generally speaking, the water temperature for dark roasted coffee should be low. Too high water temperature will easily make the dark roasted beans taste astringent and bitter. On the contrary, the water temperature for light roasted coffee can be slightly higher. If the water temperature is too low, the multi-layered fruity and sour flavor of light roasted coffee will not be brewed.

Tip 8 – Freshly ground coffee is fresher: master the grinding coarseness

Just master one principle: "the longer the brewing time, the coarser the coffee powder should be; the shorter the brewing time, the finer the coffee should be". This way you can avoid the bad consequences of grinding the coffee powder too coarsely and resulting in no taste, or grinding the powder too finely and resulting in too much flavor and caffeine.

The coarseness of the grind affects the extraction: the finer the particles, the shorter the extraction time; the coarser the particles, the longer the extraction time.

Finally, I wish everyone can drink delicious coffee——

【Recommended reading】：

How important are coffee varieties? Here are the main ones you need to know!

As a coffee novice, how to judge the coffee flavor you need from the processing method

[Beginner's Guide] How to find high-quality coffee beans? How to choose the right coffee beans for yourself?

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