As you probably already know my favourite coffee beverage is espresso, and espresso is the base for many other drinks that I enjoy and that I will describe in the following blogs.
Espresso is a brewing method and the name of the produced beverage, but it is not a level of roasting or a type of beans. In fact, any type of beans and any level of roast can be used to make an espresso.
The espresso brewing method involves pressure, in fact a rather high pressure. The beverage produced this way contains lower levels of caffeine per serving than other coffee-related beverages produced by methods that require longer brewing periods. Espresso, the beverage, is extracted out of 8 to 10 grams of finely ground coffee. According to some Italian sources it should be less, about 6.5 +- 1.5 gr. It should be served in a small cup with a capacity of 50 ml, half full, and it should have a distinctive thick layer of brown foam from tiny bubbles, known as the crema.
Espresso is meant to be prepared on purpose (expressively), at the moment and to be drunk immediately. If not, the crema will shrink and break into patches. So when you order an espresso and it is brought to your table without crema, you know there was too much time between brewing and serving which is not good. Without the crema the surface of the liquid is exposed and cools down faster. Hence, the drink loses the smoothness and the balance of its taste. With time, regardless of cooling, a perceived acidity increases.
Espresso has a little brother: ristretto, and two bigger brothers: lungo and doppio, and also two cousins: Americano and long black. I personally prefer the one and only espresso, but allow me to introduce you to the whole family.
Ristretto means limited in Italian so it is a limited espresso. It is made from the same amount of ground coffee as an espresso but with a reduced brew time, only 15 to 20 sec., instead of the usual 25 to 30 seconds for an espresso. The result is a smaller espresso (15 to 20 ml) with a concentrated flavour, thick texture and usually strong aftertaste.
Lungo means long in Italian so it is a long espresso produced by letting the extraction continue for more than 30 secs. Usually a lungo is a 60 ml beverage with more solubles and more caffeine than the ristretto or the espresso. Lungos have a thinner body and a dryer and more acid taste.
Doppio means double in Italian, so it is just a double espresso.
Now, enough with Italian lessons as the two other relatives of espresso are not italian inventions. The Americano nevertheless has an European background. Legend says that during the second World War the American soldiers found espresso too strong for their taste so they added hot water to it (to the disgust of the Italians, so the name Americano for this kind of beverage is actually not positive). So, that’s it, an espresso with added hot water. The amount of hot water varies according to the taste of the drinker.
Long black is a name for a beverage that comes from Down Under: Australia and New Zealand. Sometime in the 80’s when their coffee preferences started shifting from instant coffee to espresso-based beverages they came up with names such as short black (espresso), long blank, flat white. Long black is basically espresso + hot water but, different from the Americano, in this case you should add the espresso to the hot water so that the crema is not disturbed. Also the water to espresso ratio is kept to 2 to 1, so that the drink remains strong. One can argue whether an Americano and a Long black actually taste different, and to be honest: not really.
So with just an espresso and some hot water we can already produce 6 different beverages. And this is just the beginning! We can add milk and produced a whole new range of beverage and not to mention adding herbs, or alcohol or…. But that will be something for other blogs in the near future.
Many sites stipulate that a Lungo tastes different (some more bitterness and other flavours) due to the longer (double) extraction time that comes with the larger amount of water (2x) sused. This makes sense. An that would be just the reason that there is a difference between a Lungo and an Americano.
When a Doppio is mentioned, you read everywhere that this is double the amount of water and double the amount of ground beans compared to an Espresso. Simple as that. No one mentions a difference in flavour, just double the amount of resulting Espresso.
However, I tend to think that there must be a significant difference, for two reasons: when double the amount of water is used for a Doppio, it will take twice as long to brew. And second, with double the amount of coffee, the resistance is a bit larger and it will flow slower and take even longer to extract. Hence, the extraction time of a Doppio is more than double that of an Espresso, and, like with a Lungo, this will create a differente taste.
The main question is now: is there a difference in taste between an Espresso and a Doppio?
Hi, thank you for your reply and your question. In principle one should make a single espresso in a special single cup filter that has a smaller diameter than the double cup filter that is also used for a doppio. So because of the smaller diameter, a single cup would take the same time to make as a double cup (or a doppio) and therefore there shouldn’t be a taste difference.