Working principle of Italian coffee machine and requirements for coffee beans

An espresso machine uses a high-pressure stream of hot water to force it through finely ground coffee beans, extracting a concentrated flavor.

Analysis of the flavor and characteristics of various coffee beans

The type of coffee beans directly affects the flavor and taste of coffee. Arabica coffee beans are one of the most popular varieties, usually with a complex flavor and high acidity. This bean often has a fruity, floral or nutty aroma, with moderate acidity, suitable for people who like delicate flavors. Its relatively low caffeine content also makes the coffee softer.

Robusta coffee beans are very different from Arabica, with a stronger taste and higher caffeine content. Its taste tends to be bitter, with an earthy or woody flavor. The high caffeine content of Robusta beans makes it more stimulating, and it is also often used to increase the thickness of crema when making espresso.

In addition to these two main coffee beans, there are some other varieties such as Liberica and Aixil, each with its own characteristics. The flavor of Liberica coffee beans is usually more unique, with obvious fruity sourness and woody aroma, while Aixil beans are loved for their sweetness, fruity aroma and slight acidity. These different types of coffee beans can be selected according to personal taste to meet different flavor requirements.

The Best Types of Coffee Beans for Espresso Machines and Their Effects

Dark roasted coffee beans are usually the best choice for espresso machines. Due to their longer roasting time, dark roasted beans tend to have an oily sheen on the surface, which can produce rich crema and strong flavor during high-pressure extraction. Dark roasted coffee beans have lower acidity and strong caramel, chocolate or smoky flavors, which are very suitable for espresso machines.

In contrast, medium roasted coffee beans can also be used in espresso machines, but the crema and richness produced may not be as strong as those of dark roasted beans. Medium roasted beans retain more acidity and complex flavors, suitable for coffee lovers who like a rich and balanced taste. They can provide a softer taste while maintaining a certain coffee aroma.

In addition, blended coffee beans, that is, mixing dark roasted beans with medium roasted beans, is also a good choice. This blend can balance the intensity and acidity of the flavor, bringing a richer taste experience. This method is especially suitable for coffee lovers who want to try a variety of flavors.

High-quality coffee bean brand recommendations and market selection guide

In the market, several coffee bean brands are widely respected for their excellent quality and stable performance. For example, Illy is a popular choice for espresso machine users, and its deep roasted coffee beans are well received for their rich aroma and perfect crema. Illy's coffee beans are strictly screened and roasted to high standards, ensuring the high quality of every cup of coffee.

Another brand worth noting is Lavazza, which is favored for its diverse coffee bean selection and reasonable prices. Lavazza's beans are suitable for all tastes, from strong ESPResso to milder coffee. Its blended beans are especially suitable for consumers who want to find a balance between flavor and price.

For those looking for a higher-end option, Blue Bottle is a great choice. Known for its premium single-origin beans and fresh roasting techniques, this brand is perfect for coffee lovers seeking a premium coffee experience. While it's more expensive, its unique flavor and freshness are often worth the price.

When choosing coffee beans, you should also refer to user reviews and market feedback. Most coffee lovers pay attention to the flavor description of the beans, the taste experience, and the reliability of the brand when purchasing. Considering these factors can help you find the coffee bean brand that best suits your taste.