How Should Coffee Beans Be Stored After Opening?

Coffee beans should be stored away from four enemies: moisture, oxygen, light and heat. Keep them in an airtight, opaque container at room temperature, and buy only what can be used within a few weeks. Roast date matters as much as grinding fresh; beans roasted more than 50 days earlier have largely lost their aroma.

Rest beans three to four days after roasting before brewing, since the first two days are unstable and regional flavors are hard to taste. One-way degassing valve bags, sealed canisters and vacuum canisters each help, but none replaces using beans quickly. A 100g package makes about seven brews for one person, a useful benchmark for planning.

Many people mistakenly believe that freshly ground coffee equals freshness, but that is not the case. To truly savor the aroma of coffee, besides grinding fresh, the roast date of the coffee beans is equally crucial. Front Street Coffee, whether in-store or on its online Taobao shop, offers freshly roasted coffee beans. Beans roasted more than 50 days ago have basically lost their aroma, but in the first two days after roasting, the aroma has not yet stabilized and the regional flavors cannot be tasted either, so Front Street reminds customers to generally rest the beans for three to four days before brewing. So how should coffee beans be stored to maintain freshness after opening? Front Street has summarized the four things coffee beans fear most—moisture, oxygen, light, and heat—and shared the pros and cons of storage methods such as one-way degassing valve bags, sealed canisters, and vacuum canisters, to help everyone extend the flavor life of coffee beans as much as possible in daily life.

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Many friends think that freshly ground coffee represents freshness, but that is not actually the case. To truly experience the aroma of coffee, it is not enough to grind fresh—you also need to pay attention to the roast date of the coffee beans. Front Street, whether at its offline stores or online Taobao shop, supplies freshly roasted coffee beans, and only when customers specifically request grinding before shipping do we grind according to the customer's brewing method (espresso or pour-over).

The reason Front Street repeatedly emphasizes fresh roasting is that once coffee beans have been roasted for more than 50 days, their aroma has almost completely disappeared. So is fresher always better? Not necessarily. In the first two days after roasting, the aroma is not yet stable, and the regional flavors cannot be tasted either, so Front Street generally suggests customers rest the beans for three to four days before starting to brew.

The samples Front Street sends out are relatively small in quantity, only enough for one brew, while other packages have a minimum weight of 100g, which can make about 7 brews for one person. So how should coffee beans be kept fresh after opening? Front Street has a few tips for everyone.

How should coffee beans be stored to maintain freshness?

Front Street will first explain the things coffee beans fear most during storage. As long as you try your best to overcome and avoid them, coffee beans can still maintain enough flavor for a certain period of time.

(1) Fear of moisture Front Street mainly offers freshly roasted coffee beans. Roasted coffee is in an active state and is easily affected by the outside. In relatively humid environments, because coffee beans themselves easily absorb external odors and moisture, the beans will develop off-flavors. It is also for this reason that Front Street does not recommend putting coffee beans in the refrigerator. Beans taken out of the refrigerator after being placed inside will form a temperature difference, causing condensation, and the coffee will inevitably lose its flavor.

(2) Fear of oxygen Because oxygen causes many substances in coffee beans to oxidize, which has a negative impact on flavor and mouthfeel. Front Street Coffee (FrontStreet Coffee) bean packaging all has sealing strips. After pouring out the beans, be sure to press the sealing strip tightly.

(3) Fear of light and heat Because light and heat accelerate various reactions. The higher the temperature, the faster the deterioration, so a sealable container is needed to store coffee beans.

How Front Street stores fresh coffee [One-way degassing valve] After coffee beans are roasted, they contain compressed carbon dioxide gas inside. This gas gradually escapes from the inside of the beans, causing them to expand, so the front of the bag is equipped with a one-way degassing valve. The gas inside can escape through the one-way degassing valve, while outside air cannot get in. Each time after taking out beans, pinch the bag's zipper seal tightly and squeeze out the gas inside the bag. Because carbon dioxide is denser than air, it sinks to the bottom, so squeezing can greatly reduce the oxygen content inside, which is beneficial for storing coffee beans.

[Sealed canister] A sealed canister can isolate external air, but most use transparent materials, so they are still easily affected by light. Moreover, every time it is opened and closed, air enters, and the oxygen in it will still react with the beans inside, so if using a sealed canister, it is recommended not to store too many coffee beans at one time.

[Vacuum canister] A vacuum canister can isolate external air, but most also use transparent materials, so they are still easily affected by light. Moreover, every time it is opened and closed, air enters, and then the air is pumped out, turning the inside into a low-oxygen state. But at the same time, it also creates a low-pressure state. The pressure inside the beans remains unchanged, so the pressure difference between inside and outside increases, approaching one atmosphere, which accelerates the loss of small molecules and volatile aroma compounds inside the beans.

So Front Street still recommends that fresh coffee be stored simply in the one-way degassing valve bag it arrived in, kept at room temperature, sealed, and away from sunlight. Of course, the best approach is to buy only the amount of coffee you need each time and finish it while the beans are still fresh.

It is not recommended to store coffee in ground form. Even freshly roasted coffee beans, once ground, have their contact area with air greatly multiplied, oxidize very quickly, and the coffee easily spoils. If you do grind it, finish it as soon as possible within the two-week freshness window.

The above content is compiled by CoffeeHunters, a coffee news website.