"The pause allows for the bubbles rushing around in the liquid in the first step to calm down, rise to the top, where they end up at the foam at the head. A long pause is fine because more foam can be added in step two, but leave it for too long, and you'll annoy your customers!"
"Rather than being pumped with carbon dioxide like fizzy lagers, the black stuff gets its subtle bubbles from nitrogen. CO2 produces fizzy, bubbly beer because a lot of gas is dissolved in the liquid. Nitrogen, on the other hand, dissolves far less into the liquid, so you don't get new gas bubbles forming after the initial pour."
"Those nitrogen bubbles remain far smaller than those produced by the uncontrolled effervescence of CO2, which gives Guinness its signature creamy texture."
Pouring the perfect pint of Guinness involves a two-stage pour technique that is scientifically grounded rather than merely marketing strategy. The pause between pours allows nitrogen bubbles to rise and settle, creating the characteristic foam head. Unlike fizzy lagers carbonated with CO2, Guinness uses nitrogen gas which dissolves minimally into the liquid, preventing uncontrolled bubble formation. The smaller nitrogen bubbles produce Guinness's signature creamy texture and mouthfeel. While expert bartenders determine optimal pause timing by observation, there is no single magical duration—longer pauses simply allow more foam to be added in the second stage without compromising quality.
#guinness-pouring-technique #nitrogen-carbonation-physics #beer-chemistry #two-stage-pour-method #creamy-beer-texture
Read at Mail Online
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