You may be surprised to learn that a light roast has the most caffeine. Most people seem to think the darker a coffee is the more caffeine it has, however the longer you roast coffee the more caffeine you lose.
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A great starting point is the Specialty Coffee Association’s Golden Cup Standard: about a 19:1 ratio. That means 19 grams of water for every 1 gram of coffee, or 19 ounces of water for every 1 ounce of coffee. From there, you can make it stronger or lighter until it tastes just right to you.
