This is also a type of coffee fast rising on the popularity charts. The machines are getting more and more smart and swift, so it is not uncommon to have it at parties, where a helper usually dishes out the cups of steaming coffee as required. This coffee is more of an extension of the espresso version. This nozzle is used to froth or foam the milk for the coffee.
Cold milk is held in a container or pitcher under the steam jet.
The nozzle is kept just below the surface of the milk at all times. When switched on, the steam jet pushing with forced into the milk frothing and heating it at the same time. This milk is then added to the espresso coffee. A steaming hot creamy frothy coffee is ready. To make the froth stiffer allow the foamed milk pitcher to stand for a couple of minutes.