As already mentioned, the milk froth is the most important element of the espresso specialty. In order to obtain the optimal, fine-pored consistency, the milk should only be mixed with a minimal amount of air. This means that the milk froth remains almost liquid and can optimally combine with the espresso.
Finding the right consistency is not that easy. It is therefore worth experimenting with different quantities of milk, for example. While some swear by the full 150ml, others would use a maximum of 100ml of milk.