What Determines the Volume of a Proper Italian Espresso?

Why can’t coffee experts agree on how much espresso should be in your cup—25–30ml or 40–45ml? The debate rages on, but focusing only on millilitres misses the point. The true difference lies in the coffee blend itself, especially its roast quality and bean composition.

The short answer: There’s no universal rule. But if you pull a shot using high-quality Italian-style espresso blends, 40–45ml will showcase their full body and richness—while weaker blends may perform better at 25–30ml. The key isn’t the volume, but whether the blend can deliver a bold, thick espresso at higher yield.

Why the Confusion Over Espresso Volume?

Debates over whether espresso should be 25–30ml or 40–45ml have gone on for years. Both volumes are common, yet neither side convinces the other. The real explanation is simpler: it depends on the coffee blend’s quality and composition. A well-built blend can shine even at larger volumes, while poor-quality beans fall flat no matter the dose.

Does Coffee Bean Quality Define the Shot?

The quality of the blend is the unsung hero. Many assume that a shorter shot (25–30ml) is inherently better, but that’s not always true. With high-quality beans—especially those used in traditional Italian espresso blends—a 40–45ml extraction can produce a rich, full-bodied espresso with impressive texture. Lower-grade blends, however, often lack the strength to hold up at higher volumes, resulting in weak or thin shots regardless of technique.

Why Most Blends Struggle at Higher Volumes

Try pulling a 40–45ml shot with most commercial espresso beans, and you’ll likely end up with a disappointingly light-tasting cup. That’s not the fault of the volume—it’s the beans. Most lack the depth, roast intensity, or bean mix needed to deliver a bold flavour when extracted longer. Only carefully crafted blends with the right balance of beans can maintain body and taste at a higher yield.

The Role of Robusta in Italian Espresso Blends

A common misunderstanding is that Italian roasters add Robusta beans just to cut costs. In truth, Robusta plays a crucial role in creating the signature boldness and heavy mouthfeel of traditional Italian espresso. While Arabica offers a cleaner, softer profile, it usually can’t achieve the same intensity or crema thickness on its own. The Robusta component adds structure, weight, and a richer crema—qualities often missing in single-origin or pure Arabica-based blends.

Espresso is Blended, Not Just Roasted

As the saying goes, “Italian coffee is blended, not roasted.” This highlights that crafting great espresso starts with the blend formula, not just the roast level. Many newer roasters struggle to create authentic Italian-style espresso because they focus too much on roast profiles and neglect the blend composition. A true Italian-style espresso blend reveals its qualities most clearly when pulled at 40–45ml—if the beans are up to the task.

Frequently Asked Questions

What’s the standard espresso volume for Italian coffee?

Italian espresso is commonly extracted to 25–30ml or 40–45ml. Both are traditional, but 40–45ml is more representative of classic Italian-style shots, especially when using high-quality blends that can support the extra volume without losing body or flavour.

Why do some espresso shots look thinner than others?

Espresso can taste and look thin due to weak coffee blends, incorrect grind size, or overly short extraction times. Lower-quality beans often result in pale, underwhelming shots regardless of volume, particularly at 40–45ml, where poor blends fail to develop body or crema.

Is Robusta used in Italian espresso just to reduce cost?

No, Robusta is not added solely to lower costs. It’s included in traditional Italian espresso blends to enhance body, crema thickness, and overall intensity—qualities that many pure Arabica blends struggle to achieve on their own.

Does a longer espresso shot (40–45ml) always taste better?

Not necessarily. A longer shot can highlight rich, well-balanced blends, but poor-quality beans will taste weak or bitter at higher volumes. The blend’s roast and composition determine whether a 40–45ml shot delivers a full, satisfying cup.

Can I use any espresso beans for a 40–45ml shot?

Not all beans work well at 40–45ml. Most commercial or mild blends lack the body and intensity needed for a satisfying longer shot. Traditional Italian-style blends, especially those with some Robusta, are better suited to maintain flavour and texture at higher volumes.

Recommended FrontStreet Coffee Blends for Authentic Espresso

For a true Italian-style espresso experience, try FrontStreet Coffee’s Classic Blend. Designed for espresso and moka pot, it delivers rich body and outstanding crema—even for beginners. Its traditional Mann-Mandheling (or “Manba”) style is bold and smooth, ideal for lattes and cappuccinos. For value-focused shops, Black Cocoa Blend uses 100% Arabica with solid crema and deep flavour at a lower price. Commercial Blend is another reliable option, offering balanced taste and cost efficiency for high-volume settings. All are freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.