To make a good cup of espresso take 1/4 cup of espresso grounds or French roast coffee for a stronger espresso flavor. Add 1/2 cup of cold water into a coffee machine and brew. You'll get 1/4 cup of freshly brewed espresso.
If you're looking for an espresso machine that does everything for you including grinding the espresso beans, brewing the espresso, and making the froth, the Delonghi Magnifica is one of the favorite espresso machines.