Introduction:Although hot Americano seems simple to make, its flavor is greatly influenced by the coffee-to-water ratio and water temperature. This article delves into the standard preparation parameters for hot Americano and compares the flavor differences at four different water temperatures—55°C, 65°C, 75°C, and 90°C—at various time intervals through practical testing. It helps readers master the optimal brewing conditions and enhance the in-store drinking experience of hot Americano.

Americano is made by diluting espresso with hot water. Although the preparation process is not complicated, there are quite a few details worth paying attention to if you want to brew a cup of hot Americano with balanced acidity and bitterness and prominent aroma. In addition to the coffee-to-water ratio, water temperature is one of the key factors that directly affect the extraction efficiency and final flavor expression of the coffee.

Looking back at history, the origin of Americano dates back to World War II, when American soldiers found it hard to accept the high concentration and strong taste of European espresso, so they asked the shops to dilute it with hot water to mimic the flavor of drip coffee back in the United States, which eventually led to today’s "Americano." Nowadays, hot Americano has become one of the most widely consumed coffee beverages globally, but there is still much to learn about its preparation.

Generally speaking, hot Americano is made by mixing one shot of espresso with a certain proportion of hot water. A common coffee-to-water ratio is 1:4—that is, about 36 grams of coffee liquid mixed with 180 grams of hot water, totaling approximately 216 grams. However, depending on personal taste preferences, the ratio can be adjusted—for example, increasing the water to make the coffee lighter or reducing the water to make the flavor stronger.

When choosing coffee beans, if you want the hot Americano to have a balanced acidity and bitterness with a mild aroma, it is recommended to select a medium-roast espresso blend. For example, a blend combining beans from Colombia, Costa Rica, and Ethiopia usually exhibits complex aromas such as strawberry, grape, almond, and cream, with medium crema. When brewed into Americano, it has a refreshing taste, no obvious bitterness, and is suitable for daily drinking.

Suggested extraction parameters: Use 18 grams of coffee powder, with a medium grind size, extract for about 30 seconds to yield 36 grams of espresso, then add 180 grams of hot water to create a standard-ratio hot Americano. If you are a coffee shop operator, you may also choose a medium-dark roast commercial blend, which typically has rich crema and flavors like caramel, nuts, and cocoa, with balanced acidity and sweetness and a long aftertaste, suitable for mass production.

Suggested extraction parameters: 20 grams of coffee powder, extracted for about 25 seconds to yield 40 grams of concentrated liquid, then add 200 grams of hot water, also maintaining a 1:4 ratio. For consumers who prefer a refreshing taste, you can opt for a medium-roast single-origin bean, such as those with flavors of strawberry and guava or citrus and lemon acidity. These beans usually have low bitterness and bright flavors, making them suitable for beginners.

Suggested extraction parameters: 20 grams of coffee powder, extracted for 30 seconds to yield 36 grams of concentrated liquid, then add 180 grams of hot water to complete a refreshing cup of Americano.

Next, let’s explore the most critical question: What temperature of hot water should be used when making hot Americano? Many might think that as long as the water is hot, it’s fine—but in reality, water temperature has a huge impact on the coffee’s extraction efficiency, flavor release, and overall taste.

To find the most suitable water temperature range for in-store hot Americano, we conducted a practical test using hot water at 55°C, 65°C, 75°C, and 90°C to prepare four cups of hot Americano. We tasted them at three time points: immediately after brewing, five minutes later, and twenty minutes later, observing how different water temperatures affected the coffee’s flavor and mouthfeel.

The test used a medium-dark roast espresso blend characterized by prominent aromas of butter, chocolate, roasted chestnuts, and caramel, suitable for producing rich and layered Americano. The extraction parameters were set as follows: 20 grams of coffee powder, Galileo Q18 grinder at setting 1.8, medium grind size, extraction time of 30±2 seconds to yield 40 grams of concentrated liquid, then adding 160 grams of hot water depending on the water temperature, resulting in a total volume of 200 grams with a coffee-to-water ratio of 1:4.

At the stage when the coffee is freshly brewed, the 55°C and 65°C hot Americanos, due to their lower temperatures, can be sipped immediately, allowing clear notes of nuts, buttery cookies, and maple syrup from the blend to come through, with good body and a noticeable aftertaste. However, the 55°C cup, due to its insufficient heat, feels more like a warm drink rather than hot coffee. The 75°C Americano, being quite hot, requires sipping carefully. Its initial flavor expression is not as rich as the previous two, but the sweetness is evident with almost no acidity. The 90°C Americano, due to its excessively high temperature, is barely sippable, relying mostly on smell to perceive the aroma, limiting its flavor performance.

Five minutes later, the coffee temperature dropped by an average of about 10°C. At this point, the 55°C Americano was close to room temperature, with distinct flavors but beginning to lose aroma, and slight bitterness emerging; the 65°C Americano remained warm, with flavor and aroma still excellent, and bitterness not yet prominent; the 75°C Americano delivered the most balanced performance, with rich and layered aroma, comfortable mouthfeel, comparable to the 65°C version right after brewing; the 90°C Americano was still too hot, with relatively lagging taste and flavor performance.

By twenty minutes later, all coffees showed a significant decline in aroma. The 55°C Americano had completely cooled, with a substantial drop in taste and flavor, offering the shortest enjoyment window; the 65°C Americano was around 45°C, still performing better than the 55°C version; the 75°C Americano maintained a certain level of warmth, showing the most enduring taste and flavor performance; the 90°C Americano, though now sippable, suffered from severe aroma loss, resulting in an overall unsatisfactory experience.

Overall comparison: in terms of flavor experience right after brewing, the ranking is 65°C > 75°C > 55°C > 90°C; while over the 20-minute period (including aroma and taste retention), the ranking is 75°C > 65°C > 55°C > 90°C.

Therefore, if you are a coffee shop operator or wish to serve the best-tasting in-store hot Americano, it is recommended to control the water temperature within75±5°Cthe range. This temperature range ensures the coffee remains adequately hot to extend the enjoyment period without being so hot as to impair the taste buds’ perception of flavor, making it the best-performing choice overall.

Additionally, here are two practical tips: First, when serving, it is recommended to use preheated coffee cups to prevent the cup from absorbing heat and causing the coffee to cool too quickly; second, the above water temperature suggestions apply only to in-store service. For takeout or delivery, consider the temperature loss during transit—it is advised to slightly increase the water temperature or use insulated packaging to ensure customers receive the coffee at an appropriate drinking temperature.

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