What is foam and why do cocktails need it?

Foam is a type of liquid that is made up of tiny bubbles that are surrounded by a thin film. It is often used in cocktails as a way to add a bit of excitement and visual appeal. Foam can also help to aerate cocktails, which makes them more refreshing to drink.

How do you make foam?

There are a few ways to make foam for cocktails. One popular method is …