• Akasazh@lemmy.world
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      1 hour ago

      I think it has to do with the dissolved gas… Guinness has nitrogen vs carbon dioxide, which is denser

    • crank0271@lemmy.world
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      5 hours ago

      That’s a reasonable assumption, but this is also how a black and tan (or “half and half,” in Ireland) is made: layer Guinness or a different stout beer on top of a pale one.

        • jaybone@lemmy.zip
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          1 hour ago

          Also try what’s called a Snake Bite, which is Guinnes layered on top of a cider. The sweetness from the cider cuts the bitterness of the Guinness.

    • jim_v@lemmy.world
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      5 hours ago

      The Guinness has a bunch of tiny, light nitrogen bubbles that allow it to sit on top of CO2 bubbles.