How much caffeine is in espresso beans?

It's not accurate to say that caffeine is in espresso beans. Caffeine is present in the coffee beans themselves, not just in the espresso form.

Here's why:

* Caffeine is a natural component of coffee beans: It's produced by the coffee plant as a defense mechanism.

* Espresso is simply a concentrated form of coffee: It's made by forcing hot water through finely ground coffee beans under high pressure.

The caffeine content of espresso beans will depend on several factors:

* Type of coffee bean: Arabica beans generally have lower caffeine content than Robusta beans.

* Roast level: Darker roasts tend to have less caffeine than lighter roasts, as some caffeine is lost during roasting.

* Grind size: A finer grind will generally extract more caffeine.

* Brewing method: Espresso extracts more caffeine than other brewing methods.

To give you an idea:

* A single shot of espresso (1 oz) typically contains 60-80mg of caffeine.

* A cup of brewed coffee (8 oz) can contain anywhere from 80-180mg of caffeine.

Important note: It's impossible to provide a precise caffeine content for espresso beans, as it varies depending on the factors mentioned above.