Do you want to buy your own espresso machine but not sure how to choose from the many espresso machines found in the stores? The first thing one needs to do is gain an understanding of how these espresso makers work so that one can ask the right questions.
Hot water - around 90 degrees centigrade, is forced under pressure through coffee grounds. The pressures can be quite high - in some cases as much as 9 bars. The finely ground coffee has oils that when extracted make a rich, flavorful, strong cup of espresso.
A reasonable quality machine will produce two shots of espresso within around thirty seconds once the water is hot and the pump primed. The grinding of the coffee in the first instance makes a difference to how long this takes. In general, more finely ground coffee allows the water to run through more quickly, depending how tightly packed it is. See this article for more details: Espresso coffee resource.
There are some espresso machines that rely on a combination of a steam wand in order to create milk based coffee beverages like lattes and cappuccinos. The wand forces steam into a container of milk to make the milk hot and frothy. How much froth vs milk is required will depend on your personal preferences. There are a lot of different types of machine, some with operational differences. Basic machines are often less complex, although even a simple steam driven maker will make a good shot of espresso, perhaps even superior to the auto machines.
Making a good shot of espresso needs the basic ingredients to be right - and that starts with the coffee. The coffee you choose will need to be picked especially for your tastes and the type of machine you buy if you are going to get that perfect shot.
Another quality that a good cup of espresso must have is that it should be lightly roasted so its sugars and aroma is not lost in the brewing process.
Often a darker roasted bean will end of tasting burnt or of charcoal in the final shot. If the water in your area leaves an after taste, it is probably advisable to use filtered or spring water instead of normal tap water. It is important that the espresso machine you choose has the capability to maintain water temperatures between 92 and 96 degrees centigrade so it will make consistent tasting espresso each time.
Visit here for an interesting and fun review of the best espresso machines - by Mark Knowles at http://hubpages.com/hub/espresso-machines
