A typical recipe for a double shot of espresso may comprise of 18g of finely ground coffee and about 36g of liquid that is brewed. As we mentioned before, a double shot of espresso contains about 150mg of caffeine.
There are a few different ways to make a lungo espresso. The most common way is to keep the grind and dose the same as a normal double espresso. Then the barista would pull the shot longer – say until 54g of liquid was output from the same 18g of coffee. The longer shot time means you will likely get more bitter flavors extracted.
Often, a lungo is confused with a “long black” which is an espresso shot brewed into hot water.