Introduction:Drinking hot Americano in winter has become the top choice for many coffee enthusiasts. But did you know that the ideal temperature for a hot Americano actually varies greatly depending on the roast level of the beans? In this article, we conducted practical tests using both a dark roasted espresso blend and a medium-light roasted single origin bean across a temperature range of 60°C to 90°C. By evaluating aroma, taste, temperature stability, and overall enjoyment duration, we identified the optimal hot Americano brewing temperatures for different types of beans—helping you enjoy the best-flavored hot coffee even in winter.

When the cold wind howls and temperatures plummet, a steaming cup of Americano becomes a comforting companion for many. However, visiting different coffee shops, you may notice that the serving temperature of hot Americanos can vary quite a bit, ranging from 60°C all the way up to over 90°C. So, what is the ideal temperature range that achieves the best balance between aroma and flavor?

To answer this question, we specially selected two very different types of coffee beans for a comparative experiment: one is a dark roasted blend known for its bold flavors, commonly used in espresso; the other is a medium-light roasted single origin bean celebrated for its bright fruit acidity and floral notes. We brewed hot Americanos at four different temperatures—60°C, 70°C, 80°C, and 90°C—and conducted a comprehensive evaluation based on aroma, initial flavor, flavor development as it cools, and overall enjoyment time.

The experiment found that, whether using dark or light roasted beans, excessively high water temperatures (especially 90°C) tend to cause the coffee’s aroma to dissipate quickly, while also masking delicate flavor layers, resulting in a flat or even bitter taste overall. Additionally, overly hot beverages not only impair the drinking experience but also risk scalding the mouth. Therefore, mastering the appropriate serving temperature for hot Americano is crucial for enhancing your overall coffee enjoyment.

We first tested a dark roasted espresso blend. This bean features espresso characteristics of black chocolate, cream, hazelnut, and caramel. The grind size was set to 2.0, using 20 grams of coffee grounds with an extraction time of about 30–31 seconds to produce 40 grams of espresso, which was then combined with 180 ml of hot water at a 1:4.5 ratio (i.e., 40g espresso + 180ml water) to make the hot Americano.

At 60°C and 70°C, the coffee still retained crema and could be consumed immediately. Among these, 70°C performed exceptionally well, fully showcasing the rich aromas of cream, chocolate, nuts, and caramel cookies, with a clear aftertaste and a rounded, full-bodied overall flavor. At 80°C, although too hot to drink right after brewing, as the temperature slightly dropped, the layers of aroma and sweetness became more complex. In contrast, the 90°C hot Americano suffered from the high water temperature—not only did the crema barely form, but the aroma dissipated severely. During the cooling process, only a monotonous roasted flavor and dull bitterness remained.

After resting for 20 minutes, the 60°C hot Americano had already cooled below 45°C, with a noticeably weaker aroma and a more pronounced bitterness, resulting in the shortest optimal enjoyment window. Overall, the ranking for the dark roasted hot Americano in terms of aroma and taste is: 70°C > 80°C > 60°C > 90°C.

Next, we tested a medium-light roasted Costa Rican Bacha coffee bean. This bean highlights citrus, blueberry, and other fruit acids along with delicate floral notes, accompanied by a subtle fermented wine-like aroma and creamy texture. The grind size was set to 1.6, with extraction parameters of 20 grams of coffee grounds, a 28–29 second brew time, yielding 40 grams of espresso, which was also mixed with 180 ml of hot water at a 1:4.5 ratio to produce the hot Americano.

Due to the lighter roast, the espresso from this bean produced relatively thin crema, with barely any visible foam when hot water was added. However, across all four temperatures, the freshly brewed hot Americano showcased notes of citrus, blueberry acidity, and slight fermentation. Among them, 80°C delivered the best performance. As the temperature dropped slightly to around 70°C, delicate floral notes and a raisin-like sweetness gradually emerged, resulting in a smooth and well-layered overall taste. The 90°C sample, on the other hand, tasted overly acidic overall, with a rather bland and unappealing aroma. The 60°C and 70°C samples had no obvious flaws, but due to their lower initial temperatures, they cooled faster, offering a shorter optimal tasting window.

In summary, the ranking for the medium-light roasted hot Americano in terms of aroma and taste is: 80°C > 70°C > 60°C > 90°C.

Combining the test results of both beans, whether using dark or light roasted coffee, brewing hot Americano with water above 80°C is not ideal. High temperatures not only increase the risk of scalding but also suppress aroma release, making it difficult for the palate to detect subtle flavor layers. Moreover, volatile compounds in coffee dissipate more rapidly at higher temperatures.

Additionally, it’s worth noting that coffee’s flavor profile can vary significantly at different temperatures, especially when below body temperature, where bitterness tends to become more pronounced. Therefore, besides choosing the right serving temperature, it’s recommended that cafés serve hot Americano in preheated cups and maintain the temperature within a moderately high range of 75–80°C. This approach helps preserve good flavor while ensuring customers don’t experience a rapid drop in temperature that could negatively affect their overall drinking experience.

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