A long black is made by pouring an espresso or ristretto over hot water. A long black is similar to an Americano, which is made by adding hot water to the espresso shot; but a long black retains the crema and is less voluminous, therefore more strongly flavoured.
Did you know that long black and Americano have same espresso and water ratio? YES!The difference between them is for long black, espresso shot poured on top of the water! While for Americano, the espresso shot is added first, and the water poured on top! Here is a video on how to make long black