Does light roast have more caffeine than dark?
IAAB and I’ve been trained that yes, caffeine does come off the beans during the roast process making a light roast contain slightly more caffeine than a dark roast. Incidentally, an 8oz cup of coffee also contains more caffeine than a 1.5oz shot of espresso, so if you really want to wake up, skip the small latte and just have a regular cup of Joe*. We use a medium roast coffee for our espresso because a dark would just be too damned strong. Some places use a vienna-style espresso where the beans are actually a light roast, so this may vary from cafe to cafe.
