What is required to make the perfect espresso has already become clear after a team of chemists and mathematicians in the United States conducted a detailed study.
First of all, you don't need a lot of coffee. According to the authors of the project, this is one of the key factors for the perfect drink. 15 instead of 25 grams of coffee leads to faster preparation and an excellent taste.
The taste of coffee is determined by the way the beans have grown and the way
they're processed. There are more than 40 varieties of coffee trees in the world, but only the beans of three types are used. So it all comes down to the manufacturer's processing, which is also quite diverse.
There are many factors in making the perfect espresso. These include the amount of grains, preparation time, water temperature and its volume. Any other variation from them prevents a good result in the end.
According to mathematicians, a special machine can be developed to take these factors into account instead of having humans do it.
The study showed that one of the reasons for the unsatisfactory taste of espresso is finely ground coffee.
In combination with the unsuitable pressure, as well as errors in the amount of water and its temperature, caffeine and other ingredients in the energy drink have more difficulty dissolving, which leads to the quality not being as high and the end result.
Coarser ground coffee in smaller quantities, allows hot water to pass through better. As a result, the preparation process is accelerated and it dissolves much better.
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