Is it possible to frozen green coffee beans to keep the taste fresh?
In the traditional way, coffee will be stored in sealed packaging, placed on pallets in a clean, dry warehouse, free of contaminants. But now, many farmers, and import-export businesses often choose to frozen green coffee beans to keep the characteristics of the beans for a long time. Will the coffee quality be as expected in a negative temperature environment? Let’s find out with XLIII Coffee now
Frozen green coffee beans to prevent oxidation
Frozen green coffee beans is a relatively new method of coffee preservation for many people. However, some studies have shown that it is really useful for preventing the oxidation of coffee. When the temperature is below 0 degrees Celsius, the reduced humidity means that the coffee avoids contact with substances, gases, and water from the outside. Although the humidity in the freezer will vary over time, it remains stable (only an additional 0.5%) reduction in the long run. In addition, in the cathode environment, all microbial activities and chemical reactions take place slower than usual. The amount of water, volatile compounds in the seeds also condensed, unable to escape due to low temperature. Because there is not much change on the inside or the outside, coffee beans that are almost not oxidized will still retain their juiciness and freshness.
Frozen green coffee beans to preserve the original flavor as much as possible
According to the results of research on the topic of frozen green coffee beans at Dedan Kimathi University, coffee seems to lose only a little moisture in the first three weeks. However, after 3 weeks, coffee beans were almost completely unchanged until the end of the study. Experimental experts said that, until the sample was taken out of the freezer and roasted (medium roast level), frozen coffee still gave off an intense aroma. According to the taste test of Juiet – one of the five experts who conducted the study, the taste of frozen coffee creates a very special experience with a bold body and a full feeling. Nancy and the rest of the researchers also agree. They found that the cup of coffee preserved by freezing was somewhat tastier than a regular cup of coffee. As soon as they taste it, they have a heavy mouth feeling, fresh, sharp acidity and a characteristic sweet taste with seeds. This is because in a low-temperature environment, the beans both avoid the negative effects of the outside and have the “concentration” of substances that make the coffee taste more stable and stronger.
Notes when frozen green coffee you need to know
Moisture is the most dangerous enemy of green coffee and is also something that always exists in cold storage that is not well preserved and has frost. Storing green coffee beans in a frosted freezer can significantly degrade the quality of the coffee when it is defrosted, especially with richly flavored coffees. Therefore, it is necessary to clean the freezer and ensure that the humidity is within a reasonable range (from 11% to 12.5%) to maintain optimum freshness and flavor quality.
Coffee has the ability to absorb any odors around it. If other products are also stored in the freezer with the green coffee, they can also affect the coffee’s flavor. Roasters should take extra care when storing frozen coffee and, ideally, keep other products in a separate freezer or compartment.
Additionally, water activity in thawed coffee can also be more unpredictable than in coffee stored at room temperature. This can negatively affect the roasting process and lead to irregularities in the roast profile. Therefore, it should be frozen naturally according to standards so as not to lose water and aromatic compounds in the seeds.
Although a new preservation method requires more research to better understand the chemical reactions that take place inside green coffee beans, it is clear that freezing has outstanding advantages in optimizing freshness. , taste as well as storage time. If you want to learn more, look forward to the next articles of XLIII Coffee!
Source: perfectdailygrind
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