What’s the Difference Between Wet and Dry Foam in Beer?

November 20, 2019 | Taylor Laabs

Everyone has improperly poured a beer in their life to the grimaces and eye-rolls of their drinking buddies and colleagues. The prime illustrator of a poorly-produced draft beer in any American bar or drinking table is the overwhelming presence of foam that inundates the glass and misbalances the minute equation between liquid and bubble. The copious head of white, quickly-dissipating bubbles – you can call it “dry foam” – is a sure sign that you’re not going to have an ideal drinking experience, regardless of if you’re drinking a Natty Lite or an award-winning IPA. But what if the overwhelming presence of foam was a good thing?

If you’ve had a properly-poured Pilsner Urquell straight from a Pilsner Side-Pour faucet, you’ll know that the presence of wet foam in your pour of a Pilsner is a good thing – and by design. So, what’s the difference between the foam in a typical beer and what is present in a proper pint of Pilsner Urquell? To find out, we asked the historic Czech brewer.

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