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      "name": "Why does my espresso taste sour even at 30 seconds?",
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        "URL": "https://forum.example/t/sour-espresso-at-30-seconds/48211",
        "Created": "2026-09-18",
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      "description": "I pull 18 grams in and 36 grams out in about 30 seconds, which every guide says is right, but the shots still taste sharp and sour. The beans are a light roast from a local roaster, roasted ten days ago, and the machine is a single boiler that I switch on twenty minutes before brewing. What else could be wrong if the time is already where it should be?",
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      "ID": "comment-1",
      "name": "Light roasts need a hotter and longer shot",
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        "Created": "2026-09-18",
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      "description": "The time on its own does not tell you much with a light roast. These beans are dense and give up their sweetness slowly, so at a normal temperature and a 1:2 ratio you only get the sour acids that come out first. Raise the brew temperature by two or three degrees and try a longer ratio, around 1:2.5, before you change the grind.",
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      "description": "Lucia Ferreira is a home barista who bought her first espresso machine last spring and writes detailed threads about what she tries, with her doses, times and tasting notes. She usually reports back on which advice worked, which makes her threads useful to others with the same problem.",
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