Can you still drink coffee after the taste period? how long is the best taste period for freshly ground coffee?

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James Freeman, founder of Blue Bottle, the Apple of Coffee, once said: "the aroma of coffee beans baked from the roaster will peak within 48 hours. Therefore, we only sell coffee produced within 48 hours.

Coffee appreciation period

Bean cultivation period:

Freshly roasted coffee beans should be packed in a bag containing a single exhaust valve as soon as possible, and the carbon dioxide will run for 1-2 days. When the coffee is extracted, the powder and water will come into contact more fully. Coffee beans are like living people, people with oxygen inhalation cause cell oxidation, but also the process of aging, just baked coffee is still too young, has not reached the most mature state.

The latest fresh period:

From the end of the soybean period, it takes about 2 weeks, which is the freshest period. At this time, the coffee beans will produce a lot of aroma, these aromas will form the charming flavor of coffee.

Relatively fresh period:

Calculated from the end of the latest fresh period of about 2 weeks, the coffee beans in the bag gradually went down from their peak. But at the beginning, the quality and flavor of coffee decreased slowly, and the freshness of coffee was still at a high level. We call it "relatively fresh period" for about one month. Every coffee lover and coffee shopkeeper should strive to use up the coffee beans before the end of the "fresh period".

Disposal period:

Calculated from the end of the relatively fresh period of about 4 weeks, the quality and flavor of ripe coffee beans has been much worse than before, it is difficult to act as the word "fresh", unable to meet the picky needs of professionals. But it's okay to mix milk and chocolate sauce to make fancy coffee.

From the latest fresh period to buy everywhere a total of 10 weeks, neither long nor short, consumers should make good use of it. After the disposal period of coffee cooked beans, even if the bag is not opened, but also a sharp decline in flavor, no sense of freshness, no taste value!

Appreciation period of freshly ground coffee

Roasted coffee beans, the aroma of coffee is also very easy to send out. When you smell the aroma of coffee, it shows that its aroma is declining, and the essence of coffee is decreasing.

If the diameter of the coffee powder is doubled, the volume of a single particle is correspondingly reduced by 1 beat 8, and the surface area of the corresponding total coffee powder is doubled.

After a coffee bean is ground into powder, its surface area increases exponentially, and the area in contact with air increases hundreds of times.

Once the extremely important acidic fat and volatile fat contained in roasted coffee beans come into contact with the air, chemical changes will occur, resulting in poor taste and flavor. Among the aromatic compounds of coffee, esters and aldolase are the most volatile, and the volatilization will also make the taste of coffee worse.

Not only is the volatile loss of aromatic substances, the oxygen in the air will also oxidize the aroma components, especially the oxidation of fat, will produce a rotten flavor. Freshly ground coffee powder quickly absorbs moisture from the air, increases weight and reduces the effectiveness of extracting coffee ingredients, and internal intermolecular pressure complicates things at the micro level.

Therefore, the appreciation period of freshly ground coffee is even longer. For those of you who like to drink freshly ground coffee, when making freshly ground coffee, you must keep in mind that it is really not good to keep coffee for a long time.

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