Introduction:Flat White, an Australian-style white coffee, has rapidly risen in popularity on the international coffee scene in recent years, becoming many coffee enthusiasts' go-to choice for premium milk-based coffee. This article delves into its origins, unique brewing techniques and extraction parameters, and provides a detailed comparison with Latte and Dirty coffee in terms of volume, ratio, and flavor profile, helping you grasp the essence of this “small yet intense” milk coffee.

Among the many milk-based specialty coffees, Flat White stands out with its rich coffee flavor and refined texture, and has made a remarkable splash in the global market in recent years. Statistics show that sales of this beverage grew by as much as 56% in 2018, quickly closing in on the long-time bestseller, Latte. So what’s the allure of this coffee, born from a longstanding dispute between Australia and New Zealand? The following will explore its history, brewing method, and differences from other popular milk coffees to give you a complete picture.

The origin of Flat White has long been disputed between Australia and New Zealand. Some Australian coffee professionals claim that as early as the mid-1980s, they were already offering a drink called “Flat White” on their menus, designed for customers who preferred espresso paired with a small amount of steamed milk. It is said that the original recipe used a double shot of “Ristretto” along with a small amount of microfoam, poured directly into a small ceramic cup without latte art, and was named for the thin layer of fine white foam on top.

However, baristas in New Zealand have also presented a counterargument, claiming that one of them accidentally created this flavor-concentrated milk coffee when trying to make a cappuccino but ended up with milk foam that was too thin. Regardless of who actually invented it, Flat White has gradually gained global popularity since 2017, becoming a notable player in the specialty coffee market.

Compared to Latte, the most distinctive feature of Flat White is its smaller serving size and higher coffee concentration. The typical serving is around 3 ounces (approximately 100 milliliters), using Ristretto as the base, topped with an extremely thin layer of microfoam. This results in a more concentrated overall flavor, with the essence of the coffee standing out more prominently. This design caters perfectly to the current consumer trend of prioritizing the intrinsic flavor of coffee—even with the addition of milk, the original characteristics of the coffee remain uncompromised.

To make an authentic Flat White, it’s crucial to understand the difference between a “Ristretto” and a regular “Espresso.” Ristretto is a type of espresso with a shorter extraction time and a lower coffee-to-water ratio. Although the total yield is reduced, the flavor compounds are more concentrated. Typically, the industry uses a pressure of 9–10 bars and a coffee-to-water ratio of around 1:1.6 to produce a more concentrated coffee liquid. Compared to the standard 1:2 ratio of a regular Espresso, it delivers a more intense and layered taste.

Specifically, when making a Flat White, it is recommended to use about 19.8 grams of coffee grounds to extract 30 grams of coffee liquid, with an extraction time controlled at around 27 seconds (actual parameters may vary slightly depending on equipment performance). This extraction method ensures a well-balanced coffee liquid with a more cohesive interplay of acidity, sweetness, and bitterness, laying a solid foundation for subsequent blending with milk.

In terms of assembly, the extracted Ristretto is poured into a cup with a capacity of about 100 milliliters, followed by the slow addition of hot milk with extremely thin microfoam that has been moderately heated and frothed, allowing the coffee and milk to blend uniformly. The final product should present a rich fermented wine aroma, with the berry acidity harmonizing with the milk to create a natural sweetness, and the finish carrying a mellow aftertaste of caramel and chocolate.

Aside from Flat White, Dirty coffee also uses Ristretto as its base, but differs greatly in presentation and taste. The hallmark of Dirty coffee lies in its use of a chilled cup and cold milk, where the espresso is poured directly onto the surface of the cold milk, creating a striking contrast and layered transition. The appeal of this drink lies in its dynamic shift from “intense to mild, dark to light,” and it is recommended to enjoy it ice-cold, sipping continuously to experience the unique process of the espresso and fresh milk transitioning from a bold collision to gradual harmony.

In summary, Flat White holds a distinct place in the global specialty coffee market with its refined serving size, rich and balanced coffee flavor, and delicate milk integration technique. Whether you are a coffee novice or a flavor-chasing connoisseur, understanding the brewing principles and nuanced differences of this milk coffee can enrich your experience, whether you're enjoying or crafting it.

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