What is a ristretto shot?

A ristretto shot is indeed defined as a short shot of espresso made with less water compared to a standard espresso shot. This results in a more concentrated and intense flavor profile. The brewing process involves using the same amount of coffee grounds as a regular espresso shot but extracting it with a smaller volume of water, typically around half the volume. This allows for the extraction of the sweeter and more aromatic compounds from the coffee, leading to a richer taste without the bitterness often associated with longer shots.

The other answers describe different terms or concepts that do not apply to what a ristretto is. A long shot of espresso refers to an espresso made with more water, which would dilute the flavor rather than intensify it. A type of brewed coffee generally refers to non-espresso coffee brewing methods, while an espresso shot with added foam describes drinks like cappuccinos or lattes, neither of which captures the essence of a ristretto. Understanding these differences is essential for developing a well-rounded knowledge of espresso variations and brewing methods used in barista training.