What is the standard serving size for a single espresso shot?

The standard serving size for a single espresso shot is 1 ounce, which is equivalent to 30 milliliters. This measurement is widely recognized among coffee professionals and is essential to ensure a balanced flavor and consistency across various espresso preparations. A single shot of espresso typically involves the extraction of coffee from about 7-9 grams of finely ground coffee under high pressure, resulting in a concentrated coffee beverage that is rich in flavor and aroma, and the 1 ounce measurement supports this ideal balance.

The other options do not represent traditional espresso serving sizes. For instance, 2 ounces refers to a double shot, which is composed of two single shots combined. Similarly, 3 ounces and 1.5 ounces are not standard measurements for a single shot of espresso but may relate to other coffee beverages or specialized servings that are not typically categorized as a standard espresso. Understanding these measurements is crucial for anyone involved in coffee preparation, as it directly affects the quality and taste of the served espresso.