What is the recommended head of foam when pouring beer?

The recommended head of foam when pouring beer is typically around 1 inch. This amount of foam, also known as the beer’s "head," serves several important purposes. A proper head helps to release the aromatic compounds in the beer, enhancing its flavor and aroma. The foam also acts as a barrier, helping to retain the carbonation within the beer, which keeps it fresher for longer.

Having about 1 inch of foam strikes a balance; it is sufficient to provide the aeration and sensory experience without overwhelming the drinker or causing excessive spillage. Too much foam (like the 2 inch or 3 inch options) can lead to a flat beer by dissipating the carbonation too quickly, and it may create a perception of waste due to the excess foam. On the other hand, pouring without any foam can lead to a less enjoyable drinking experience, as it misses the benefits mentioned earlier.

In summary, a head of foam is crucial for both the enjoyment and quality of the beer, and the 1 inch recommendation is widely accepted in the bartending industry as a standard for a well-poured beer.