What is a dry cappuccino next to lungo and ristretto?

A long shot, or lungo, uses the same dose of coffee powder as a standard espresso but pushes two to three times the water through it, which lowers concentration and can taste more bitter. Ristretto goes the other way: same dose, less water, finer grind, and a smaller, more concentrated cup. Standard espresso sits between them, usually near a 1:2 coffee-to-water ratio.

Shops label drinks like americano, latte, cappuccino, and what is a dry cappuccino, and the extraction terms underneath them are often blurred. Crema, flow rate, and the signs of under- and over-extraction all shift with how much water passes through the puck, which is why the specialty coffee field keeps revisiting long extraction methods and how they read in the cup.

In coffee shops, Americano, latte, and cappuccino are everywhere, but do you truly understand what espresso means? Does simply adding more water make it espresso? Today, Front Street Coffee will provide a detailed explanation of the definition of espresso, as well as the differences between long extraction and regular extraction. The article will cover the broad and narrow concepts of espresso, the operational key points and flavor characteristics of Ristretto and Lungo, and will also explain the impact of extraction flow rate on taste, the specific manifestations of under-extraction and over-extraction, as well as new explorations in the specialty coffee field regarding long extraction methods in recent years. Whether you are a beginner just getting into espresso or an enthusiast hoping to refine your extraction techniques, this content can help you understand the extraction logic of espresso more systematically.

Walking into any coffee shop, names like Americano, espresso, latte, and cappuccino are almost everywhere. You may have already distinguished espresso from Americano, but what exactly does espresso mean? Does simply doubling the water volume count as espresso? Front Street Coffee has already organized the basic knowledge about espresso, so let's now talk about exactly how long extraction differs from regular extraction.

There are many standards for defining espresso, and the broad and narrow interpretations are not unified. The commonly accepted definition is: finely ground coffee powder extracted with high-pressure water, the final product must have a beautiful layer of crema (crema), and the coffee-to-water ratio is controlled at approximately 1:2.

Ristretto Espresso

In English it is called ristretto, and in Italian it is written as rististed, meaning "restricted amount." It refers to a cup of coffee that is smaller in volume and higher in concentration than a standard espresso. In practice, the same weight of coffee powder is used, but less water is used for extraction, and the grind is finer than regular espresso, with the aim of extracting more concentrated coffee flavors.

Lungo Espresso

In Italian it is called lungo, and in English it is written as long, translated as long shot (lengthened espresso). The method is to use the same amount of coffee powder, but increase the water volume to two to three times that of regular espresso, ultimately obtaining a larger cup of coffee. The taste will be relatively thinner, but if the lungo method is used to handle lighter-roasted coffee beans, the final product has rich flavor layers and overall balance. When using the lungo method, the grind needs to be adjusted slightly coarser, and the water flow rate should also be a bit faster, to prevent over-extraction.

For beginners, flow rate control can first be measured using a quantitative standard, generally regarding 20 to 30 seconds as the ideal range. After gaining some experience, you can observe the shape of the water flow during extraction to judge the flow rate. Foreign baristas often use "mouse tail" to describe the flow rate of coffee. In short, during extraction the water flow cannot fluctuate or change unpredictably, otherwise it indicates obvious channeling, and there is no need to continue tasting this cup of coffee.

The flow rate of espresso directly determines the taste of Espresso. If the flow rate is too fast, the essence of the coffee has not yet had time to dissolve into the water before the water has already passed through the coffee powder layer, resulting in coffee that is weak and tasteless; if the flow rate is too slow, the essence and off-flavors of the coffee will all enter the water, causing the coffee to have an obvious burnt-astringent sensation or irritating bitterness.

Lungo Espresso

In the specialty coffee industry, lungo is actually not very popular. During preparation, an espresso machine is also used, the amount of coffee powder remains unchanged, but the water volume is increased to two to three times, producing a larger-volume beverage that tastes relatively thin. For consumers with rich tasting experience, lungo espresso lacks body and mouthfeel, and usually provides a poor drinking experience, with more bitterness and smoky notes.

However, recently a new trend has emerged in the specialty coffee field: using the lungo method to handle lighter-roasted coffee beans, resulting in coffee with good complexity and balance, and personally I also find it quite tasty. If you have ever struggled with how to balance the acidity in a certain espresso recipe, you might try the lungo approach, with the grind size slightly coarser, allowing the water flow rate to be slightly faster, in order to avoid over-extraction.

What Are the Extraction Standards for Espresso

Espresso is a type that many people like. It is not as bitter as Americano, and contains a more appealing flavor. Coffee extraction itself is a very particular discipline that requires systematic study to master.

So, what exactly are the espresso extraction standards ?

Extraction is essentially the use of chemical means to extract valuable flavor substances from raw materials, and these extracted components have a great impact on the final taste and aroma of coffee. The substances in coffee are not all released at once, but are extracted gradually in stages, so that the flavor can be more pure. The first to be extracted are acidity and fruity notes, followed by sweetness, and only in the final stage are bitter notes extracted. If the standards are not properly controlled, the taste of the coffee will be directly affected. The setting of the extraction plan is also meant to adapt to different people's preferences for coffee flavor, making the coffee taste better for a certain person.

So, what exactly are the extraction standards for espresso? First, if the extraction time is short, the coffee will be more acidic; if the time is extended, it will be more bitter. The water temperature should generally be maintained between 90 and 95 degrees Celsius, and the extraction yield can be controlled within the range of 18% to 22%, or adjusted according to personal preference.

Under-Extraction and Over-Extraction

"Under-extraction" refers to the contact time between coffee powder and water being too short, so that many residual substances in the coffee powder have not been released, and these substances could have increased the flavor of this cup of coffee. On the palate, the tongue will clearly feel a sharp acidity, lacking sweetness, and sometimes also carrying a salty taste, tasting thin, watery, and with a short finish. A good finish is pleasant, but if the coffee's finish is short and has an oily sensation, or shows vegetable-like or woody flavors and dissipates quickly, it is also very likely a manifestation of under-extraction.

The causes of "under-extraction" may be water temperature being too low, grinding being too coarse, and additionally a coffee-to-water ratio that is too high can also cause under-extraction.

"Over-extraction" refers to the contact time between coffee powder and water being too long, bringing out too many soluble substances from the coffee, and this extraction result will bring negative flavors. On the palate, the tongue can clearly feel bitterness, and this bitterness will remain at the base of the tongue, covering the coffee's other flavors; the drying sensation is obvious and long-lasting, making people resist it; the overall cup is flat and hollow. The so-called hollow sensation means that after drinking the coffee, it feels as if you drank coffee, but no flavor or taste remains in the mouth.

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