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  • ppetrelli@lemmy.one
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    1 year ago

    On hot days I prepare a 1:8 ratio of ground beans to water and let it soak for 24 h at 4 C. It never felt different from regular hot drip coffee despite hearing that cold brew has a higher caffeine concentration. Guess I know why now - 150 mg in hot drip vs. 207 in cold brew is only a 38% increase in caffeine concentration.

    • hrimfaxi_work@midwest.socialOP
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      1 year ago

      I actually work directly with food scientists. I’ll ask somebody when I’m feeling more myself!

      And yes! I learned how to do it yesterday. It’s dummy simple. The most course grind possible is what appears to be recommended. You brew 1 part coffee to 4 parts water in the fridge for 12–18 hours. Then you just strain it. I do not recommend rapid consumption 💀

      EDIT: Yeah, it’s the duration. Hot brewed coffee has a not-insignificant amount of caffeine because a smaller grind puts more surface area in contact with water at any given time, and the hot water accelerates extraction of caffeine (and flavor) from the grounds. Cold brewed coffee blows that out of the water, even with a super coarse grind and even at super low temperatures, by virtue of the time involved.

  • adj16@lemmy.world
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    1 year ago

    I think they’re referring to the fact that cold brew is usually made in a concentrate. It’ll taste pretty rough at that high of a concentration, most people cut it with water or cream to make it a better flavor, but obviously that’s going to reduce the caffeine concentration too

    • hrimfaxi_work@midwest.socialOP
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      1 year ago

      Yeah. My heart rate and eye twitch is what caused the initial search, though. Whatever the levels are in this particular batch, a 32 oz tumbler was a poor vessel choice and chugging was a poor consumption rate decision.