Caffeine is one of the compounds that extracts fairly quickly in the process. When you brew your coffee and mix the coffee grounds with the hot water, many of the compounds from the coffee begin to be absorbed and dissolved into the water. Pound for pound, darker roasts have very slightly more caffeine although the difference is negligible for this purpose of this article.Įxtraction. While this does happen to some extent, it is offset by other things that happen during the roast such as dark roasts containing less water. It’s a common misconception that lighter roasts contain more caffeine due to the roasting process (which is essentially cooking the beans) ‘burning away’ the caffeine. In the States the majority of coffee is sold as 100% Arabica or sometimes (particularly for espresso) as something like 90% Arabica to 10% Robusta.
Now, making coffee with pure Robusta is very rare in Western countries, despite being the norm in places like Vietnam. The Robusta, which grows at a lower altitude and thus needs to be hardier and more resistant to bugs, contains nearly twice the amount of caffeine as Arabica. The two main varieties of coffee, Arabica or Robusta, have some very different characteristics and one of those is caffeine content.
Most portafilters where you put the ground coffee will be ‘full’ once you add 14g of coffee or so, so there isn’t much room for error on this one. A good rule of thumb in the espresso making world is to use 7g of coffee beans for a single shot of espresso and 14g of coffee beans for a double shot of espresso. The following things can affect how much caffeine can be extracted from the beans and into the drink.Īmount of coffee used. So to find out the figure for the amount of caffeine in an espresso shot it’s good to look at some of the variables we will be working with. What Variables Can Affect The Caffeine In Espresso? And as I mentioned, the fact is that there is no hard and fast way to figure out the amount of caffeine in your espresso short of putting a lab coat on implementing some college-level chemistry. They are not going to be accurate all of the time. This means that doing the maths, a 7g single espresso shot will have 7*0.012*0.9 = 75.6mg of caffeine and a 14g double espresso shot will have 14*0.012*0.9 = 151.2mg of caffeine.Ī quick scan of the internet seems to agree with these as rough figures that work as a general rule.
#ESPRESSO CAFFEINE CONTENT FULL#
So during a full brew we can expect to extract most of that, if not all of it. Now looking at the science behind caffeine in coffee, this website shows that caffeine makes up 1.2% of the mass of coffee beans. We’re going to assume standard variables such as 14g for a double and 7g for a single and a coffee bean blend that is 100% Arabica (more on that later). It was even observed that a chain like Starbucks where you would expect consistency can give differences in caffeine in their espresso from 63-91mg of caffeine per cup in the same store! There are studies that support this and show that ranges of 25-214mg of caffeine per cup and 15-254mg per cup. There are multiple variables that can affect how much caffeine ends up in your drink so we have to accept that any value is an estimate at best. The first thing to point out is that the amount of caffeine in any drink or in any espresso shot is not constant. I can assure you the process was most scientific! Amount Of Caffeine In An Espresso Shot If you’d like to see how I arrived at those figures then keep reading. If you order your coffee ‘large’ or ‘strong’ then there’s a good chance the barista will use 3 or 4 shots in which case you can simply ask them how many shots they are using to get a good idea of the amount of caffeine you are drinking. And your cappuccinos and lattes and everything else are typically made with a double shot. It’s also worth pointing out that it’s pretty rare to get only a single shot, even if you order straight espreso. The caffeine content of espresso can vary considerably, but a good rule of thumb is to assume around 75mg for a single espresso shot and 150mg for a double espresso shot. So how much caffeine is there in one espresso shot? It pays to be informed about how much of a drug you’re putting in your body, especially when you drink as much as I do! I’ve often wondered how much caffeine there is in an espresso shot.
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