Espresso (/ɛˈsprɛsoʊ/, Italian: [esˈprɛsso]), sometimes spelled expresso, is coffee brewed by forcing a small amount of nearly boiling water under pressure through finely ground coffee beans.
Espresso is generally thicker than coffee brewed by other methods, has a higher concentration of suspended and dissolved solids, and has crema on top (a foam with a creamy consistency).As a result of the pressurized brewing process, the flavors and chemicals in a typical cup of espresso are very concentrated.Espresso is also the base for other drinks such as a caffè latte, cappuccino or caffè Americano. Espresso has more caffeine per unit volume than most coffee beverages, but because the usual serving size is much smaller, the total caffeine content is less than a mug of standard brewed coffee, contrary to a common belief.

濃縮咖啡（/ɛ'sprɛsoʊ/，義大利語：[es'prɛsso]），有時被拼為"expresso"，是使用經過精細研磨的咖啡豆，9個大氣壓力之下，使用90~95度C的熱水少量萃取而成。
濃縮咖啡通常比其它咖啡的萃取方法厚實，具有懸浮和溶解的固體的濃度較高，並具有Crema在上面（具有乳脂狀稠度的泡沫）。由於使用加壓萃取的工藝方式，結果令到濃縮咖啡中的香氣和風味都非常集中。
濃縮咖啡也是其他飲品的基底，如拿鐵咖啡，卡布奇諾或美式咖啡。濃縮咖啡的每單位體積比大多數咖啡飲料有著更多的咖啡因，但由於通常的份量大小要小得多，因此總咖啡因含量低於一杯使用標準方式萃取的咖啡，這和一般人對濃縮咖啡的印象是不同的。
如果您到旅沐來，建議您嚐嚐濃縮咖啡!!我們會給您兩杯不同萃取濃度的濃縮咖啡，一杯是正常的(約為22~28ml)，另一杯為短萃(Ristritto，只取頭段約15~18ml，濃度更高、口感更集中)