Is espresso stored overnight in the refrigerator harmful to your body? Is frozen coffee better than freshly ground coffee?

There are often friends who ask Xiangjie about the question of "Can you drink espresso overnight?" The reason comes from the fact that they are in a hurry to go out in the morning and have no time to grind freshly brewed coffee, so they want to brew the coffee several days in advance, so that you can carry coffee directly to work when you go out in the morning.

To be reasonable, if it is espresso without adding anything, as long as it is stored well, the problem will not be too big overnight. But obviously, many friends are not only concerned about the safety of coffee, but also its flavor. What will the coffee taste like after a night of storage? Will it develop more aroma through fermentation like cold extraction, or will it develop a single flavor and dull taste like coffee that has been left for a long time? So let's test from Qianjie to see what flavor the espresso coffee will turn into after standing overnight.

The coffee experiment Front Street had extracted multiple portions of espresso one night ahead of schedule and placed them in the refrigerator and freezer chambers. In addition to comparing the difference between freshly extracted coffee and overnight coffee, Front Street also tested the difference between freezing and refrigeration.

Then the coffee beans used in Qianjie this time are Qianjie Italian style with strawberry candy·Espresso in the bean list. The parameters are as always: the powder amount is 20g, the powder ratio is 1:2, and the extraction time is 30 seconds. After extracting the espresso, Qianjie immediately sealed it into disinfected glass bottles, and then placed it in different areas of the refrigerator for testing the next day. There are three groups of content for this test, namely espresso, American coffee, and milk coffee. Before the test began, Qianjie would first take out the frozen concentrate to defrost and heat it, then extract multiple portions of fresh espresso coffee, and then make American and dairy coffee at a ratio of 1:4 (coffee and water/milk)., then start the comparison.

The difference between espresso coffee in the espresso group is very obvious. The freshly extracted espresso coffee has a very rich aroma and a very full taste. Qianjie drinks it with obvious flavors of strawberry, flower fragrance, chocolate, and cocoa. The taste is mainly sweet and sour., mellow, with a long aftertaste, and coffee will have a dense taste because of the existence of oil; Refrigerated and frozen concentrates are without exception. Their aroma and oil are dissipated after long-term storage. We can only drink the original taste of coffee from them. The sweetness is low, and the acidity and bitterness are more prominent. But the taste of frozen concentration is better than that of refrigerated concentration, tastes softer, and then has some berry flavor tonality.

American coffee groups Similarly, the difference between American coffee groups is the same as espresso. The American style made from freshly extracted and concentrated has a very rich aroma, and then the frozen and refrigerated American style is slightly inferior. The difference in taste will not be so great, mainly in the intensity of the aroma.

The performance of the milk coffee group surprised Qianjie. Although it tasted better from fresh extract and concentrated, the milk coffee made from refrigerated and frozen concentrate tasted not bad. The milk coffee made from freshly extracted and concentrated tastes fragrant, with flavors of strawberry, almond, cream, and chocolate, just like drinking a liquid version of strawberry cheesecake; while the milk coffee made from refrigerated and concentrated is chocolate, cocoa, with a slight berry tone, and the taste is also mellow and fragrant; The milk coffee made from frozen concentration will be better than the former. In addition to the thicker taste, the aroma will also be more prominent. We can even drink some strawberry flavor from it, which is also very good.

To sum up, we can know that although the aroma of overnight espresso is not as good as that of freshly extracted espresso, they are not inferior. As long as the beans used are of high quality, the coffee can still perform well even after one night, especially if stored frozen. But everyone should pay attention to that if you really want to make espresso coffee in advance, you must pay great attention to the sealed equipment, storage environment and time to avoid the impact of coffee spoilage on human health.

Also, although frozen concentrate performs better than refrigerated espresso in all aspects and can be stored for a longer time, it takes a certain amount of time to defrost before use. So you'd better choose the storage environment based on your own usage time and scenarios ~

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