How do moka pots compare with ristretto, normale and lungo?

Espresso comes in three main types: ristretto, normale, and lungo. Each uses the same fine grind and high-pressure steam extraction, but differs in dose, yield, and time. Ristretto stops short for a sweeter, denser shot, normale is the standard reference, and lungo runs longer for a larger, more diluted cup.

Espresso originated in early nineteenth-century Italy as a way to get rich coffee quickly, replacing slow steeping. Because each batch of beans varies with climate and soil, blended coffee beans are often used to balance aroma and body. Moka pots brew at lower pressure, so they cannot match a machine's crema or intensity.

Espresso is the base for many coffee drinks like lattes and Americanos, but did you know it actually comes in three types: Ristretto, Normale, and Lungo? This article starts with the origins and characteristics of espresso, explains the key parameters in its preparation, and analyzes the extraction methods and differences of the three types of espresso one by one. At the same time, the article also shares Front Street Coffee's extraction plans for different espresso types, including specific recommendations for dose, yield, and time, helping coffee enthusiasts understand the extraction logic of espresso more systematically.

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Italian espresso, also called Espresso, uses steam pressure to quickly force high-temperature hot water through a layer of coffee grounds, extracting a small cup of pure black coffee that is rich, full-bodied, and covered with golden crema on the surface. Although its name is not often seen directly on cafe menus, common drinks such as Americanos, lattes, and cappuccinos all depend on it, making it the soul of a coffee shop.

What are the characteristics of Italian espresso?

Before the birth of espresso, people mainly brewed coffee by steeping, which required grinding the coffee beans very fine and then going through a relatively long, slow extraction process, making the wait quite lengthy. Espresso originated in the early nineteenth century, when Italians, in order to get a rich cup of coffee in a short time, came up with the idea of using steam pressure to force high-temperature, high-pressure water through a puck of coffee grounds, thereby speeding up the original drip-style extraction. Through continuous improvement, the semi-automatic and fully automatic espresso machines we commonly see today gradually developed.

Because espresso uses fine grinding, high water temperature, and high-pressure extraction, espresso brings together a variety of tastes, and various flavor compounds stimulate the taste buds exponentially. As a crop, coffee varies with conditions such as climate and soil, and even if it comes from the same region, the flavor of each batch of coffee beans will differ. By complementing one another's strengths and weaknesses, blended coffee beans help present a more balanced and stable aroma and mouthfeel with each extraction. Therefore, Front Street recommends using blended beans specially designed for espresso machine extraction. Front Street's bean list includes four espresso blends, which are also suitable for brewing with espresso machines and moka pots.

Traditional espresso usually uses extremely dark-roasted coffee beans and adds Robusta beans rich in oils, resulting in a burnt, bitter, and intense taste that needs to be drunk slowly in several sips. In recent years, however, with the popularity of specialty coffee, the quality of coffee beans and extraction techniques have continued to improve, and coffee drinkers have pursued higher flavor and mouthfeel standards, so today's espresso no longer tastes only burnt and bitter. For example, the espresso served at Front Street stores presents fermented wine aromas, berry-like sweetness and acidity, rich aroma, and a soft mouthfeel that is very easy to drink.

What details should be noted when making Italian espresso?

Common commercial espresso machines can provide more than nine stable atmospheres of pressure and hot water above 90 degrees Celsius. The high pressure forces hot water to quickly pass through finely ground coffee, extracting a coffee liquid with rich crema, intense aroma, and a heavy mouthfeel. In order to extract an ideal cup of espresso, the barista's job is to master the various parameters that affect coffee flavor and then adjust them to the optimal extraction range.

In operation, there are many factors that affect the flavor of a cup of espresso, including coffee bean quality, roast level, grind size, machine boiler pressure, water temperature, distribution and tamping force, dose, extraction time, yield, and many other factors and details. Usually, the machine's pressure and water temperature are set and will not be changed easily. Distribution and tamping force are controlled according to the barista's habits. In daily practice, the four major factors used to adjust extraction are dose, time, yield, and grind size. Brewing parameters will change subtly according to daily air humidity and the condition of the coffee beans, so they need to be adjusted up and down to achieve a better extraction result.

What types of espresso are there?

According to the golden cup theory concept proposed by the Specialty Coffee Association of Europe, after water contacts coffee grounds, coffee releases about 30% of soluble substances, while the remaining 70% of the large-molecule woody structure cannot dissolve. Of that 30%, only 2/3 consists of substances with better flavor molecules, so we need to adjust several key parameters to keep the extraction yield at around 20%.

According to the extraction method, espresso can be divided into three types: Ristretto (short extraction), Normale (normal), and Lungo (long extraction), all of which are espresso liquids quickly extracted using an espresso machine.

Ristretto usually refers to extra-concentrated espresso, also called refined extra-concentrated coffee. Compared with the common Espresso, Ristretto is more niche, and the Flat White we often see is made with Ristretto as its base. Ristretto means "restricted," and we can understand it as "restricting" the extraction amount of coffee, taking only the front and middle portions of the espresso, thereby increasing the coffee's concentration.

For example, Front Street's Espresso extraction plan is to extract 40 grams of coffee liquid from 20 grams of coffee grounds, with a coffee-to-liquid ratio of 1:2 and a time of 30 seconds. Extracting Ristretto means extracting only 70% of the Espresso, that is, extracting 28 grams of coffee liquid from 20 grams of coffee grounds, and the time will naturally be shortened accordingly. In addition, you can also make the grind finer so that the flow rate becomes slower, making the coffee liquid more concentrated. Since each coffee shop will make different adjustments according to the coffee beans used and the specific flavor and mouthfeel the barista wants to present.

Normale is the most common and most popular espresso. It is actually Espresso in the usual sense, and most of what is currently offered on the market is mainly Normale, though it is not emphasized much. According to golden cup standards, Normale's extraction yield is between 18% and 22%, and its concentration range is 8% to 12%.

Lungo is coffee made with twice as much water as normal. "Lungo" means "long, extended" in Italian, and it is also called "stretched espresso," which means extending the extraction time, thereby reducing the coffee's concentration and making it taste softer. After repeated adjustments and tastings, Front Street's final extraction plan is to control Lungo's coffee-to-liquid ratio at 1:5. That is, using 20 grams of coffee grounds, extending the extraction time to 42 seconds, and extracting 100 grams of coffee liquid.

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The above content is compiled by CoffeeHunters, a coffee news website.