Ristretto

An ristretto is a strong black coffee with no dairy products involved. It can be made with a ratio of water to coffee in quantities of 1:1 and 1:1.5
For our coffee at Lake Safari Lodge, we use a 1:1.5 ratio, so 20g of coffee = 30mls of ristretto.
To make a ristretto on espresso machine:
Measure 20g of beans
Grind beans
Put ground beans in portafilter
Put portafilter into coffee machine
pull a 30 ml shot within 30 seconds
Temp: 93°C
Pressure: 9 bar
Watch Process here
Here are some examples of a ristretto