How Long Do Coffee Beans Last?

First of all, we make a clear premise that the so-called shelf life refers to the best tasting period of coffee, not the shelf life of food (usually the manufacturer will write the shelf life of one year), and coffee should be avoided in the form of roasted coffee beans. Light, sealed and stored under cool conditions, without these premise, no matter how powerful the master is, no matter how powerful it is!

 

Our recommendation is: 15~30 days from the time the coffee is roasted. Some coffees can be extended to around 45 days under proper storage conditions. Therefore, the "expiration" we mentioned is generally based on 30 days. At this time, the exhaust of the coffee beans basically disappears, and the coffee beans from medium and dark roasting to dark roasting will be slightly "oily". However, if the coffee is seriously oily due to improper storage, or it smells only woody, it means that the coffee beans are no longer suitable for continuous tasting. For health, it is better to throw them away~

 

First of all, understand that the flavor performance of coffee will reach its peak on the 3rd to 7th day of roasting, and then it will be lost over time, and finally only the woody flavor will be left. The first lost flavors are mainly floral and fruity aromas, volatile acids, spices and herbs, while flavors such as nuts, chocolate, and caramel are relatively less volatile, and ground coffee powder will be more preserved than coffee beans. Lose flavor fast. This is the fundamental reason why we want our coffee to be fresh, ground and brewed.

 

So if you want a coffee that has passed the best tasting period to still have rich floral and fruity notes, bright and lively acidity, it is basically impossible. However, at this time, some basic taste experiences of coffee, such as chocolate and nutty taste, will be more prominent, the taste will tend to be balanced, and the complex chemical changes in coffee beans may develop some unexpected flavours, or The taste that was not obvious before, but is only highlighted now~ The important thing is that you know how to rush.

1. Change the extraction time;
2. Change the water temperature;
3. Change the grind size.

These three elements are the most basic method.

 

The roasting date of coffee beans represents freshness, and beans that have been roasted within 2-3 days can be called fresh coffee beans. However, it is not actually when the beans taste the best that they are roasted and bought. It is mixed with the smoke smell when roasting and the smell of the beans themselves.

 

The freshly roasted cooked beans have what is commonly known as "dry feeling", which is mainly characterized by sharp sourness, not round enough, sweetness not yet in a good state, and a slight astringency hovering in the mouth. The roasting process is a complex chemical and physical process with variables that we don't understand. But dryness is a real taste.

 

Each pound of coffee beans, in an unsaturated environment, emits about 6 to 10 liters of carbon dioxide, equivalent to 1% to 1.2% of the total weight of the bean. 35% of them are discharged in the first 3 days after baking. And then the carbon dioxide is expelled, there are also aromatic volatiles (volatile aromatics). Coffee beans will continue to emit nitrogen dioxide (exhaust gas) about 48 hours after they are just roasted. Therefore, brewing coffee beans immediately after roasting will not taste good roasted coffee beans.

In the next 1-2 weeks, although the taste will change with time, get an extra journey and witness the ups and downs of coffee like flowers and flowers, usually we will taste the best taste in about 1 week. From the experience of roasters, the taste period of Italian coffee beans is about 15 to 30 days (depending on the degree of roasting). Great tasting season.

"Shelf life and storage method"

 

Because of its low humidity, coffee beans (powder) are not easy to breed microorganisms and have a long shelf life. Generally, the shelf life of coffee in aluminum foil bags is 12-18 months. It is recommended to buy about 2-4 weeks of coffee beans at a time, and the coffee beans that are kept indoors are also recommended to be used for 2-4 weeks when the flavor is the best and most fragrant.

 

Today's coffee bean packaging is equipped with a one-way exhaust valve. It allows the oxygen in the package to be removed, while preventing the entry of external oxygen, which can slow down the oxidation degree of the beans. If you buy a bag of Italian or hand-brewed beans at home, it is recommended to store them in an airtight jar or a vacuum jar.