The Role of Robusta in Italian Espresso Blends

When visitors walked past the Molinari Caffè booth at the 2005 SCAA conference in Seattle, they couldn’t miss the bold “100% Arabica” sign. But behind the label was a more complicated truth: the company had only gone all-Arabica that year due to market pressure, not conviction. For over a century, Molinari had built its blends with both Arabica and Robusta—like most traditional Italian espresso roasters.

The short answer? Many European roasters still include 5%–20% Robusta in espresso blends—not to cut costs, but to enhance crema stability, mouthfeel, and flavor balance. The debate isn’t about whether to use Robusta, but how and why.

Why Robusta Was Traditionally Used in Espresso

For decades, Robusta played a central role in Italian espresso blends. Export manager Fabrizio Mengoli of Molinari Caffè admitted that while the company had gone 100% Arabica in 2005 due to customer demand, mixing Arabica with Robusta was their longstanding philosophy. The move to pure Arabica wasn’t driven by conviction—it was market-driven.

Unlike their American counterparts, many European roasters didn’t share the same anti-Robusta stance. Ernesto Illy was famously vocal against using Robusta, but across Europe, the bean remained a common tool for achieving specific espresso traits—especially crema.

The Criticisms of Robusta in Espresso

Critics argue that Robusta is used purely to reduce costs and extend shelf life. They claim it creates harsh, unpleasant flavors: woody, rubbery, tarry, cat urine-like, musty, or like a wet brown paper bag. These negative impressions largely stem from low-quality, poorly processed Robusta beans—typically natural-processed and low-grade.

Detractors also contend that any Robusta, no matter how carefully selected, will invariably degrade the taste profile of espresso, adding undesirable notes that linger through the crema.

Why Some Roasters Still Defend Robusta

Defenders argue that Robusta contributes unique benefits when used correctly. A well-selected, properly processed Robusta—especially washed or wet-processed varieties—can add body, crema stability, and a smooth mouthfeel without introducing off-flavors. When blended thoughtfully with complementary Arabicas, it can round out acidity and enhance overall flavor.

David Schomer of Espresso Vivace, Dr. Joseph John of Josuma Coffee, Mauro Cipolla of Caffè D’arte, and other specialty-focused roasters have all experimented with and defended the use of Robusta in espresso. Schomer, for example, developed a preference for high-quality Indian washed Robusta, typically using it at around 10%–20% in his blends.

The Science and Sensory Impact of Robusta

There’s broad (though not unanimous) agreement that Robusta can produce a thicker, more persistent crema compared to Arabica. This crema acts as a flavor carrier, holding aromatic compounds on the tongue longer. Critics argue this merely extends the duration of bad flavors—but supporters say it enhances the sensory experience when the blend is well constructed.

Kenneth Davids of Coffee Review notes that the poor reputation of Robusta mostly comes from badly processed natural beans. He favors high-quality washed Robusta from India, Uganda, and Mexico, using them at 10%–20% in his espresso blends. He describes a good Robusta as contributing nutty, spicy notes and improving blend synergy.

"A really good Robusta can add positive flavor notes," Davids says. "It has a kind of nutty, spicy taste." He also observes that in espresso, Robusta seems to "knit things together," creating a smoother, more resonant cup—effects rarely seen in filter coffee.

How Top Roasters Use Robusta Today

Some roasters keep the exact percentage confidential, treating their Robusta sources like trade secrets. Italian roasters, in particular, have historically sought out specific Robusta varieties that add body and crema without compromising Arabica flavor. That knowledge remains closely guarded.

Schomer recalls asking an Italian roaster in 1993 why Robusta was used. The answer: Italian roasters were obsessed with finding Robustas that enhanced body and crema without dragging down the cup. Since then, Schomer has sought out milder, estate-grown, washed Robustas—treated with the same care as high-end Arabicas. He now considers quality Robusta essential to his blends for its ability to boost crema viscosity and longevity.

Cipolla, meanwhile, views espresso as a craft being lost—even in Italy. He argues that a true espresso should be a dark roast, using the "right type of Robusta" roasted on different curves than Arabica, and blended at precise ratios. For him, an all-Arabica espresso is missing a key component of the traditional profile.

Frequently Asked Questions

What percentage of Robusta is typically used in espresso blends?

Most traditional espresso blends that include Robusta use around 5%–20%. Some roasters go as high as 30%, but the most common range for balanced flavor and crema enhancement is roughly 10%–15%.

Does Robusta really improve crema in espresso?

Yes, many roasters and experts agree that Robusta contributes to a thicker, more persistent crema. While the crema may enhance the sensory experience, whether that improvement is positive depends on the quality of the Robusta and the overall blend.

Why do some roasters avoid Robusta completely?

Roasters often avoid Robusta due to its historical association with low-quality, poorly processed beans that introduce harsh, unpleasant flavors—such as rubbery, woody, or musty notes. American roasters, in particular, tend to reject it for these reasons.

Is it possible to use high-quality Robusta in espresso?

Yes. Washed or wet-processed Robusta from regions like India, Uganda, and Mexico—when carefully selected and blended—can add desirable body, smoothness, and crema stability without negative flavor impacts. Some roasters use 10%–20% of these high-end Robustas in their espresso blends.

Why is Robusta controversial in specialty coffee?

Robusta is controversial because it’s often linked to cost-cutting, lower quality, and unfavorable flavor profiles. Most specialty coffee focuses on Arabica for its complexity and cleaner taste, and many roasters see Robusta as incompatible with specialty standards—though this view is changing among some espresso-focused producers.

What do Italian roasters think about Robusta in espresso?

Many traditional Italian roasters continue to use Robusta, believing it is essential for creating the body and crema that define a classic Italian espresso. Some treat their Robusta sourcing as a closely guarded secret and prioritize specific estates or processing methods.

Recommended FrontStreet Beans for Espresso Blending

For espresso blends requiring more body and crema, FrontStreet Coffee’s Classic Blend is an excellent choice. Designed specifically for espresso and moka pot, it delivers rich, creamy crema even with basic equipment—ideal for home or commercial use. If you prefer an all-Arabica option, the Black Cocoa Blend offers bold flavor and smooth texture at a lower price point. Both are optimized for espresso extraction. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.