Introduction:To brew a latte with balanced flavors and a smooth texture, every step—from selecting the right coffee beans and mastering milk foam thickness to precise integration and latte art—is crucial. This article delves into the history and evolution of the latte, analyzes how different roast levels affect flavor, and provides an in-depth look at the various stages of steaming milk, temperature settings, and latte art pouring techniques. Whether you’re a beginner or a coffee enthusiast, you’ll gain practical tips from this guide.

Although lattes may seem simple, they involve many details such as the roast level of the coffee beans, the texture of the milk, and the integration and latte art. Only by thoroughly understanding each aspect—from historical background to practical operation—can you brew a truly memorable latte.

In fact, even before the espresso machine was invented, the combination of coffee and milk was already popular in Europe. As early as the 17th century, this pairing emerged. It wasn’t until 1867 that William Dean Howells first mentioned the term “caffè latte” in his book Italian Journeys. At that time, espresso machines were not yet widespread, and coffee brewing methods were still quite primitive. The word “latte” comes from the Italian word for milk, so ordering a “latte” in Italy would often just get you a glass of plain milk. With the popularization of espresso machines and steam wands, the modern latte gradually took shape. By the 1980s, baristas in Seattle began drawing designs on the coffee surface with delicate milk foam, marking the beginning of latte art.

The recipes for lattes vary slightly from shop to shop. Factors such as coffee bean selection, type of milk, extraction ratio, and technique all influence the final flavor. But fundamentally, a latte is a beverage based on a large amount of milk paired with espresso. Adjusting the coffee-to-milk ratio, switching bean varieties, or changing the type of milk can all lead to distinctly different taste experiences.

To make a latte with outstanding flavor, choosing the right coffee beans is essential. Generally, coffee beans suitable for lattes need to be compatible with espresso machines, so beans with very light roasts are usually not the first choice. The roast level affects the overall flavor profile: the darker the roast, the more pronounced the caramel and chocolate notes, which may also come with a stronger bitterness; conversely, the lighter the roast, the more prominent the milkiness, but it can easily taste sour, thin, or lack aroma. Therefore, it’s recommended to choose medium to medium-dark roasted beans to achieve the ideal balance between coffee and milk.

For those who are just starting to try making lattes and want a rich crema and bold coffee flavor, medium-dark roasted blends are a good option—such as the commonly available Black Cocoa Blend, Commercial Blend, or Classic Blend. These beans are often a combination of Brazilian pulped natural, Indonesian Mandheling, and Vietnamese washed beans. After dark roasting, they develop intense roasted aromas and excellent crema performance.

If you prefer iced lattes, you might consider blends specifically designed to complement the sweetness of milk—such as the Strawberry Sugar Espresso Blend, which combines beans from Costa Rica, Colombia, and Ethiopia. It features rose floral notes, citrus tones, and fruity aromas of grapes and dried blueberries, making the overall flavor fresher and more vibrant.

It’s worth noting that the freshness of coffee beans directly impacts extraction performance and flavor release. After roasting, beans contain a large amount of carbon dioxide, which temporarily seals in the aroma; but over time, these gases gradually dissipate, and the aroma fades as well. Generally speaking, about two months after roasting, the crema and aroma of espresso will noticeably decline. It’s recommended to choose coffee beans roasted within five days to ensure the flavors are at their peak.

Next, let’s talk about the actual process of making a latte. A common latte ratio is 1:6, meaning 40 grams of espresso is paired with 240 grams of steamed milk. Taking a common extraction scenario as an example, using 20 grams of coffee grounds to extract 40 grams of espresso in 27 seconds serves as the base for the latte.

Steaming milk is one of the key steps in making a latte. First, you’ll need a steam wand (most semi-automatic coffee machines come with one) and a suitable milk pitcher or latte art pitcher, which helps control the thickness and fluidity of the milk foam more precisely. In terms of milk selection, although room-temperature milk, cold milk, whole milk, or skim milk can all be steamed, if you’re aiming for fine-textured foam, stable consistency, and aroma, it’s best to use cold-stored whole fresh milk.

When steaming milk, it’s recommended to use 40% to 60% of the pitcher’s total capacity to facilitate control and avoid waste. Taking a commonly used 550 ml pitcher as an example, filling it with about 240 ml of milk—just to the bottom of the spout—meets the needs of most lattes.

Before starting to steam, first release the internal condensation water from the steam wand (known as “purging”), then adjust the angle of the steam wand to insert it at a 45-degree angle into the milk, positioned slightly to the right of the center cross of the milk surface, forming a semi-submerged state, while maintaining a counterclockwise whirlpool.

Once the steam is turned on, you’ll hear a distinct “hissing” sound, indicating the frothing stage. This stage mainly forms large bubbles. Adjust the time according to the desired milk foam thickness. Generally, increasing milk from half-full to two-thirds full (suitable for latte foam thickness) takes about 3 seconds. Be sure to maintain a consistent whirlpool to evenly incorporate air.

Next is the stretching (or texturing) stage, where the steam tip is fully submerged into the milk foam layer (but not touching the bottom), focusing on heating rather than further frothing. The goal of this stage is to refine the coarse foam. The temperature is recommended to be controlled between 55 and 65 degrees Celsius. Once it exceeds 60 degrees, proteins are prone to denaturation, affecting texture and mouthfeel.

Finally, there’s the integration and latte art. Combining the extracted espresso with the steamed milk is key to determining whether the latte has a smooth texture. Proper integration prevents layer separation or a gritty feel, laying a solid foundation for subsequent latte art. Latte art is not only a visual delight but also a display of skill and experience. With proper integration and latte art, a latte that excels in both flavor and appearance is complete.

An ideal latte should have a buttery-smooth mouthfeel, rich and lingering chocolate flavors, accompanied by caramel and toasted bread aromas, with a sweet aftertaste that leaves a lasting impression.

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