Espresso

What is Espresso? Espresso is an Italian-born coffee brewing method in which hot water is forced under roughly nine bars of pressure through finely ground coffee, producing a concentrated 25 to 30 ml shot crowned with a layer of crema. The technique emerged from late-nineteenth and early-twentieth-century Italian inventions and was modernized into the style we recognize today by Achille Gaggia's lever-piston machine in 1947. A single shot typically delivers around 65 mg of caffeine in just a few seconds of sipping, making espresso both a culinary tradition and a daily ritual across Europe and beyond.

Origin and History

The story begins in 1884, when Angelo Moriondo patented a steam-based coffee machine in Turin — an early precursor that proved coffee could be brewed faster and stronger under pressure. In 1901, Luigi Bezzera filed a patent for a machine that could brew individual servings, shifting coffee from a batch beverage to a personal one.

Desiderio Pavoni purchased Bezzera's patents in 1903 and launched commercial production in 1905, putting espresso machines into Italian cafes. The defining leap came in 1947, when Achille Gaggia introduced a lever-operated piston system. By pulling on the lever, baristas forced water through the grounds at far higher pressure than steam alone could provide — and in doing so, they created the thick, persistent crema that has been the signature of true espresso ever since.

How It Is Brewed

The method itself is precise. Roughly 7 g of finely ground coffee, plus or minus half a gram, is dosed into the portafilter for a single shot. Water heated to about 88 degrees C, give or take two degrees, is then forced through the bed of grounds at around 9 bars of pressure. Extraction takes 25 to 30 seconds and yields a 25 to 30 ml shot.

Crema, the hallmark golden foam on top, is a colloid of emulsified coffee oils. As pressurized water passes through the grounds, it dissolves carbon dioxide trapped from roasting; when the brew exits into the cup at normal pressure, that gas escapes and lifts the oils into a stable foam. There is no single roast level required — light, medium, and dark roasts can all be pulled as espresso, with each delivering a different balance of acidity, body, and bitterness.

Espresso in Context

Although espresso belongs to coffee culture rather than the world of wine, it shares a great deal with what we appreciate in a fine glass. Both reward attention to origin, processing, and craft; both express terroir and roaster or producer style; and both are best enjoyed slowly, with focus on aroma and texture as much as flavor.

In a wine shop setting, an espresso is the natural punctuation mark to a tasting or a long conversation — small in volume, concentrated in character, and a respectful way to refresh the palate between very different experiences.