The Origin of Espresso: How Italy Invented the Shot

Espresso is often thought of as ancient, but in fact it's one of the youngest ways coffee is made — the modern espresso shot, with its golden-brown crema on top and its characteristic concentrated body, dates only from 1948. The path to that 1948 moment runs through 60 years of Italian machine engineering, from Turin steam experiments to Milanese lever-piston mechanisms. It's a story of specific inventors, specific patents, and specific incremental improvements — a useful reminder that the drink at your local espresso bar has a much more recent history than the coffee it's made from.

The problem espresso was solving

Late 19th-century Italian coffee had a specific commercial problem: cafés brewed coffee in bulk and kept it warm on stoves. This meant slow service and stale coffee — quality deteriorated within an hour or two of brewing.

Italian inventors began working on machines that could brew coffee on demand, individually, quickly — matching the pace of a working café. The engineering path went through several iterations, gradually converging on a specific solution: fine-grind coffee, hot water forced through under pressure, delivered in a small cup within roughly 30 seconds.

1884: Moriondo's Turin steam machine

Angelo Moriondo, an entrepreneur from Turin, filed the first known patent for an espresso-adjacent machine in 1884 (patent no. 33/256). His machine used steam pressure from a boiler to force water through a coffee bed and into a cup.

Moriondo's machine was designed for use at the General Exposition of Turin in 1884, where it won a bronze medal. Only a few were built. Moriondo didn't commercialise the design widely and the machine didn't become common outside Turin.

Moriondo's design is nonetheless the first documented example of the fundamental espresso idea: brew coffee faster, per-cup, by using pressure rather than gravity^[4].

1901: Bezzera's commercial espresso machine

Luigi Bezzera, a Milanese engineer, filed the more influential patent in 1901 (Italian patent no. 61707). Bezzera's machine improved on Moriondo's design in several important ways:

• Per-cup group heads — Bezzera's machine had multiple brewing points (group heads) so several cups could be brewed simultaneously, each with its own portafilter of coffee.
• Faster brewing — approximately 30 seconds per cup vs the several minutes of older methods.
• On-demand operation — no pre-brewed batch; each cup was made fresh when ordered.

This is when "espresso" acquired its name. The word came from the same root as the English "express" — meaning both "pressed out" (referring to the pressure-brewing method) and "expressly for you" (referring to the on-demand service model).

1905: Pavoni commercialises the design

Bezzera was an engineer, not a marketer, and had limited commercial success with his patent. In 1905, Desiderio Pavoni bought Bezzera's patent rights and began commercial manufacture of espresso machines under the La Pavoni brand.

Pavoni's contributions:

• Manufacturing scale — La Pavoni built machines in quantity, making them accessible to cafés across Italy.
• Pressure release valve — a small technical improvement that prevented steam from hissing over customers.
• Marketing — Pavoni established espresso as a distinctive Italian café product, not just a technical brewing method.

By the 1920s-30s, espresso machines were common in Italian urban cafés. But the coffee they produced would still not be recognised as modern espresso by contemporary standards — because they used steam pressure, which is limited by the physics of boilers to roughly 1.5-2 bar. That pressure was enough to brew coffee quickly but not enough to produce crema^[5].

1938-1948: Gaggia and the invention of crema

The final and most important invention moment came from Achille Gaggia, a barista and inventor working in Milan. Gaggia patented a lever-piston mechanism in 1938 (Italian patent 365726), but wartime disruptions delayed commercial production. His fully realised machine went into commercial production in 1948.

How the Gaggia lever mechanism worked:

• A large spring was compressed by the barista's downward pull on a lever handle.
• The spring, released, pushed a piston through a chamber of hot water.
• This forced water through the coffee bed at pressures much higher than steam alone could produce — approximately 8-9 bar.

Why this mattered so much:

• Crema emerged. At roughly 8-9 bar of pressure, coffee oils and dissolved CO₂ emulsify into microbubbles, producing the golden-brown foam on top of a shot. Below this pressure threshold, there's no crema. Modern research on the physics of espresso extraction has characterised this pressure-dependence in detail^[1].
• Higher extraction yield in a shorter time. The higher pressure enabled the ~25-30 second, ~30 mL shot format that became standard.
• A new sensory profile. Espresso became sweeter, more aromatic, and more body-forward than the pre-Gaggia version.

This is why 1948 is treated as the birth date of modern espresso, even though machines were being called "espresso" for the previous 47 years. The drink Gaggia's machine produced is what people mean today when they say espresso.

What the science confirms

Modern research on espresso extraction has quantified what Gaggia demonstrated experimentally:

• Pressure-crema relationship: the golden-brown crema layer on a properly pulled shot is an emulsion of coffee oils, dissolved CO₂, and other extracted compounds. It forms reliably at around 8-9 bar and either doesn't form or is very thin below about 6 bar^[1].
• Temperature sensitivity: modern espresso is typically brewed at 90-96°C. Small temperature changes meaningfully shift the flavour balance between acidity, bitterness, and sweetness^[2].
• Extraction variability: espresso is among the most variable brewing methods — small changes in grind, dose, temperature, and pressure produce large flavour changes. Studies of commercial espresso variance have documented substantial variability in even carefully- operated commercial shops^[3].

See Espresso Explained and What Is Crema? for more detail on the modern extraction physics.

From lever to pump machines

Gaggia's lever machines were physical to operate — pulling the lever required real force, and consistent shots required practice. Over the 1950s-70s, espresso machines gradually transitioned from lever to pump designs:

• Pump machines use an electric pump (rotary or vibratory) to generate pressure continuously.
• Advantages: consistent pressure without barista effort; easier to operate at high volume; more compact.
• Trade-off: some espresso enthusiasts argue lever machines produce a distinctive shot profile because the pressure decays during extraction (starts high, tapers down) rather than staying constant.

Modern high-end machines include lever designs (La Pavoni Europiccola, Elektra Micro Casa a Leva), traditional pump machines (nearly all commercial machines), and increasingly sophisticated pressure profiling machines that electronically vary pressure during a shot — bringing back some of the pressure-decay behaviour of lever machines with electronic precision.

Espresso's global spread

Espresso remained largely Italian until the mid-20th century. It spread outward via several vectors:

• Italian immigration carried espresso to communities worldwide — particularly in Argentina, Australia, and parts of North America — during and after the war.
• The 1970s Italian coffee bar aesthetic became an international style influence, adopted by European cafés outside Italy.
• Second-wave chains from the 1970s-80s — Starbucks and its competitors — built their business model on espresso-based drinks (lattes, cappuccinos, mochas), spreading espresso as a global consumer product.
• Third-wave specialty coffee from the 2000s returned attention to espresso quality specifically — high-end machines, careful barista work, single-origin espresso shots.

Today, espresso is arguably the world's most influential coffee format. Most café menus outside Italy are still predominantly espresso-based (americanos, lattes, cappuccinos, mochas, cortados, flat whites — all built on the espresso shot as a base^[4].

Common misconceptions

• "Italians have been drinking espresso for centuries." Espresso as a drink dates from 1901 (as a technical brewing method) and 1948 (with crema, as we recognise it). Coffee has been in Italy since the 17th century, but modern espresso is a 20th-century product.
• "Gaggia invented espresso." Gaggia invented modern crema-topped espresso. The machine, brewing method, and name were all pre-existing when Gaggia's lever mechanism entered production.
• "Crema is what determines a good espresso." Crema is a marker of pressure and freshness, not necessarily quality. Some excellent shots have thin crema (older beans); some mediocre shots have thick crema (very fresh beans, poor extraction). It's a useful signal, not a quality guarantee.
• "Espresso has more caffeine than drip coffee." By volume yes, per serving usually less — a typical single shot is ~30 mL / ~63 mg caffeine; a typical drip cup is ~240 mL / ~95 mg caffeine. See How Much Caffeine Is in Coffee?.

The honest summary

Modern espresso is a 20th-century invention that came together over three main patents: Moriondo's 1884 steam- powered brewing machine, Bezzera's 1901 per-cup on-demand espresso concept (with Pavoni commercialising it from 1905), and Gaggia's 1948 lever-piston mechanism that produced enough pressure (~8-9 bar) to create crema for the first time. The drink we call espresso today — small, dark, high- extraction, crema-topped, served in about 30 seconds — is the direct descendant of Gaggia's post-war Milanese café innovation. Everything before 1948 was a precursor; everything after has been a refinement of the extraction envelope Gaggia opened.