Four essentials for making a good cup of coffee the coffee machine is very important

Let's take the most popular Italian coffee as an example to explain the essentials of production in detail. To make a good cup of coffee, there are four elements: the choice of coffee machine, the quality of coffee beans, human factors, environmental changes, and any of the above factors are indispensable.

Coffee machine selection

1. Boiler capacity: boiler capacity is large, the outlet water temperature is more stable, coffee quality is more stable.

2. Coffee machine temperature: whether to maintain stability, but also affect the quality of coffee.

3. Atmospheric pressure: nine atmospheric pressure values are ideal for making coffee.

4. Water temperature: international standard coffee machine water temperature requirements are 90°C, but also according to the degree of coffee beans roasting to adjust. If the coffee beans are roasted deeply, the outlet temperature of the coffee machine should be reduced, otherwise the coffee extracted is easy to have a burnt taste and bitter taste. SPR shop suitable for use with 90°C to 91°C water temperature production.

Note: The outlet temperature of coffee production refers to the outlet temperature of the machine head, which is different from the temperature of the direct hot water output of the boiler.

Coffee Bean Selection

1. The main characteristics of Arabica(also known as Alpine Bean):

The smell of fragrant is stronger;

It is not easy to have bitter taste;

Creama(coffee oil) content is moderate;

Higher acidity;

Caffeine content is 30 -40% of Robusta.

2. The main characteristics of Robusta:

poor aroma;

It is easy to have bitter taste after deep baking;

Creama more;

Low acidity;

High in caffeine.

Preservation of coffee beans

1. Unopened coffee beans:

Suitable for storage in a cool, well-ventilated environment, suitable for temperature 18°C-22°C. As far as possible, do not put it in too dry place (humidity below 54% is too dry), so its preservation environment requirements are similar to red wine.

2. Opened coffee beans:

Coffee beans in contact with the air at the same time, its flavor began to lose, and a complete coffee beans and air contact area is limited, but coffee beans ground that is formed powder, there are countless faces and air contact, so that the loss of flavor accelerated. Therefore, when making coffee, grind it as much as possible, so as to ensure the quality of each cup of coffee. As for the preservation of the opened coffee beans, it is suitable for sealed preservation, but do not place it in a too humid environment, because the coffee beans are afraid of moisture, and the fat of the coffee beans is easy to lose, and the flavor will also deteriorate.

Coffee bean preservation points:

Coffee beans, whether opened or not, are afraid of high humidity.

Coffee beans, whether opened or not, should not be stored in a mixed environment, especially in the refrigerator.

After opening the coffee beans, as long as the correct packaging is sealed, it is acceptable to use within three days (up to five days), but also pay attention to the preservation environment.

Ground coffee beans are best used immediately.

human factors

1. Base espresso:

Barista(barista) should know how to taste espresso, because as long as espresso is perfectly made, other fancy coffees are easy to ensure quality, so espresso is the basis of Italian coffee; so to master Italian coffee, you must first learn how to drink and taste espresso.

2. Familiar with the machine:

Barista must have a considerable degree of coffee expertise and professionalism, but also must have a considerable degree of understanding of the coffee machine used, only to be able to master the performance of the machine, in order to make a good cup of coffee.

3. Professional production skills:

Professional training and continuous practice can achieve correct and skilled skills, so that the quality of each cup of coffee can be guaranteed.

4. Time to extract espresso:

The standard extraction time for a cup of 25cc to 30cc espresso is 25 seconds, but the range of 22 seconds to 28 seconds is also considered a reasonable extraction time, so that the quality of coffee can be controlled.

5. Factors affecting espresso extraction time:

Choice of coffee beans and adjustment of grinding thickness: Theoretically, the dark roasted beans are thicker and the medium roasted beans are thinner, so adjusting the grinding thickness of coffee beans is one of the important factors.

Coffee powder quantity standard: Generally speaking, the powder quantity of each cup of Singer espresso is 7g to 9g, which is determined by Barista for coffee flavor positioning and consumer preferences to extract espresso concentration.

Powder pressing: The pressure of coffee powder filling in the handle of the coffee machine must be very accurate. To fill the coffee powder to the most solid level, the handle can be stuck on the head and the espresso can be extracted. The filling pressure must be filled with appropriate pressure and rotated left and right for 3 to 4 times.

changes in the environment

1. Changes in temperature:

The higher the ambient temperature, the finer the coffee beans grind; otherwise, the coarser the coffee beans grind. Generally speaking, the environment for coffee making is 18 to 23 degrees.

2. Changes in humidity:

The higher the humidity, the coarser the coffee beans grind. Compared with humidity, temperature is mainly affected by ambient temperature when making coffee.

3. Water quality requirements:

Generally speaking, water below 70ppm(proportion of mineral content in water) is soft water, and water above 70ppm is hard water. The higher the mineral content of the water, the heavier the impurity produced by coffee making, so it is recommended to use 60ppm to 140ppm water quality to ensure the aroma of coffee.