Why are dark roast beans usually used for espresso?

[RichardCoffee]

Do other roasts not taste good if they're made in an espresso machine?

 

[paulc]

Interesting question! How 'bout it coffee lovers? What's your take on espresso blends and roasts? Or has this subject been previously discussed ad nauseum and we should look for it?

 

[eldub]

The common theory is that lighter roasts generally taste more bitter due to the high-pressure extraction method employed by espresso machines highlighting the acidity.

 

[topher]

There are plenty of light roasted espressos. I think the reason for the darker roasts in the States is due to the fact that most Americans drink it with milk. Cappuccinos, Lattes and Mochas. If you take say Lavazza espresso and make a latte, to me it comes out more like a cafe au lait. Any one else feel this way?

 

[John P]

Topher: Agree with the Americans and milk statement, but there is also the reason that most roasters do not know how to sculpt and profile their roast. Roasting dark is easier, and it is a way to hide average to low quality components.

And Lavazza should never be used as an example for anything.