Caramel. Cola spice. Stone fruit that lingers as the cup cools. Marshell tastes like nothing else out of Peru, and the story of how it got here is every bit as unlikely as the flavour profile.
Some coffee varietals arrive with fanfare. Decades of research, published genetic data, official registrations, the works. Marshell arrived because one woman noticed an odd-looking tree on her farm, ignored it for fourteen years, and then watched it survive when a fungal disease wiped out everything else around it.
That's not the usual origin story for a coffee that scores 92 points at Cup of Excellence. But then, Marshell isn't a usual coffee.
A tree that didn't belong
In 1997, a coffee farmer called Grimanés Morales Lizana spotted an unusual plant on her farm, La Lucuma, in the San Ignacio province of Cajamarca, northern Peru. It didn't look like anything else she was growing. Different leaf shape, different structure, different vibe. She didn't think much of it. For fourteen years, that odd tree just quietly grew alongside her Bourbon, Catuai and Catimor.
Then 2011 happened. A fungal disease called ojo de pollo – literally "chicken eye", named for the round, sunken lesions it leaves on coffee leaves and cherries – tore through Grimanés's plantation. Caused by Mycena citricolor, it thrives in the wet, high-altitude conditions of Cajamarca and can devastate an entire farm in a single rainy season. Hers did. Everything was wiped out.
Everything except that one odd tree.
This is where the story shifts. Grimanés began propagating exclusively from the survivor. She named the resulting varietal Marshell, a word constructed from letters in the names of her family members, honouring her father-in-law, Marcelino. (You'll see the spelling vary across the industry. Marshel, Marshall, Marshell. We're going with Marshell, which is how it's most commonly identified in Peru.)
The moment everything changed
Fast forward to October 2019. The Alliance for Coffee Excellence held its third Cup of Excellence Peru in Jaén. An international panel of cuppers from Japan, South Korea, the US, Australia, Hong Kong, Russia, the UAE and Peru evaluated 209 submissions, eventually narrowing them down to 21 winning lots.
At the top of the pile? Grimanés Morales Lizana, with a washed Marshell from La Lucuma. Score: 92.28. She beat a Geisha into second place (91.44) and a Catuai into third (91.40). She also became the first woman to win Cup of Excellence Peru. That detail deserves more than a footnote.
The speciality coffee world sat up. A completely unknown varietal, from a tiny farm in a remote province, had outscored some of the most celebrated cultivars on the planet. That doesn't happen every day.
So what actually is Marshell?
Here's where things get properly geeky. And, honestly, a little murky.
The prevailing view (and the one most widely repeated) is that Marshell is a natural mutation of Bourbon. It looks different from Bourbon, but shares enough visual characteristics that the theory holds together. The 2019 Cup of Excellence officially described it as an "unidentified mutation of the Bourbon varietal", and most Peruvian importers and producers back this up.
But there are other theories. Some have suggested Marshell might actually be related to Costa Rica 95, a Catimor-group cultivar that has Timor Hybrid genetics in its lineage, and therefore a trace of Robusta DNA. One UK roaster reported that genetic testing they commissioned through RD2 Vision came back identifying their Marshell lot as "a rare form of Catimor". A third possibility, mentioned by some industry sources, is that Marshell is a Bourbon-Ethiopian hybrid.
Research is, to put it diplomatically, incomplete. No definitive, peer-reviewed genetic testing has been published. That's partly because Peru doesn't yet have a national institution dedicated to coffee varietal research in the way Colombia's Cenicafé or Costa Rica's ICAFE do. The infrastructure is still being built.
What we know for certain: the Peruvian government has officially recognised Marshell as an approved varietal, and its physical characteristics – distinctive leaf shape, tree structure, and remarkable disease resilience – set it clearly apart from anything else grown in the region. For coffee geeks, this ambiguity is half the fun. Marshell is a varietal whose story is still being written.
The Marshell Family Tree
Marshell
The varietal at the centre of this article. Discovered on Grimanés Morales Lizana's farm in San Ignacio, Cajamarca, Marshell shrugged off an ojo de pollo outbreak that destroyed everything else around it. Believed to be a natural mutation of Bourbon, though some genetic testing has pointed towards Catimor heritage. Won Cup of Excellence Peru in 2019 with a score of 92.28, beating a Geisha and a Catuai.
What does Marshell taste like?
This is where things get exciting for anyone who actually wants to drink the stuff rather than debate its family tree.
Marshell coffees from Cajamarca tend towards a profile that's rich, sweet and elegantly balanced. Across the lots we've cupped and the producer reports we've read, a consistent picture emerges: caramel and brown-sugar sweetness, cola-like spice, stone fruit ranging from peach to plum, and a clean, expressive acidity that can lean towards pomegranate, white grape or apple cider depending on the lot. Honey-processed Marshells often pick up a syrupy, marzipan-like quality. Anaerobic and extended-fermentation lots can push into floral and tropical fruit territory, with notes of yellow fruit, sugarcane and wildflowers.
Body is typically silky rather than heavy, and the cup has a habit of evolving as it cools. A note that's often missed at brewing temperature shows up clearly once things drop a little. It rewards patience.
In competition settings, Marshell has consistently scored above 87, with the best lots comfortably clearing 90. It's shown up in the top positions of multiple Peru Cup of Excellence competitions since its 2019 debut, reinforcing the idea that the original win wasn't a one-off.
Built for the fight
Here's the thing that makes Marshell genuinely special, beyond its cup score. It's tough.
Most speciality-grade coffee varietals are agronomically fragile. Bourbon, Typica, Geisha, SL28: brilliant in the cup, but vulnerable to coffee leaf rust, coffee berry disease, and the various other fungal and bacterial issues that plague high-altitude tropical farming. The varietals that are tough enough to shrug off rust and ojo de gallo tend to be Catimor-group cultivars, which historically have a reputation for cupping flat, vegetal, or just plain dull.
Marshell appears to have cracked that compromise. It cups like a high-end Bourbon (or better) and shrugs off the diseases that have historically made high-altitude farming in Cajamarca precarious. Producers in San Ignacio, Jaén and La Coipa consistently report strong resilience to ojo de pollo, coffee leaf rust, and Cercospora. That's a rare combination, and it explains why seeds from Grimanés's original plants have been propagated and distributed across the wider Cajamarca region at remarkable speed.
If the Catimor theory of Marshell's parentage turns out to be true, the disease resistance suddenly makes a lot of sense. Catimor's whole point of existence is its rust resistance, inherited from the Robusta side of the Timor Hybrid. If Marshell is a Catimor that happens to cup beautifully, that's the holy grail. If it's actually a Bourbon mutation that just happens to be resistant, that's almost more remarkable. Either way, producers don't really care which it is. They care that it works.
Why Cajamarca matters
Marshell's story is inseparable from where it's grown. Cajamarca is Peru's most prolific speciality coffee region, responsible for roughly 9% of the country's total production and a disproportionate share of its Cup of Excellence winners. San Ignacio, the province where Marshell was discovered, sits along a belt of dramatic, steep terrain near Peru's northern border with Ecuador. The kind of landscape where growing coffee is genuinely difficult.
Altitude here sits between 1,600 and 2,000 metres. Infrastructure is minimal. Many farms lack mains electricity. Roads are rough at best. Processing coffee in these conditions is a logistical feat that doesn't get enough credit. But the microclimate is extraordinary: cool nights, warm days, significant rainfall, and volcanic soils rich in organic matter. It's these conditions that give Cajamarca coffees their characteristic sweetness, clarity and complexity.
The combination of these conditions and Marshell's resilience is what makes the varietal such an exciting prospect for the region. Producers who'd previously been forced to plant Catimor purely for its disease resistance (and accept the cup-quality compromise that came with it) now have a varietal that delivers both. For farms operating on tight margins, in remote locations, where a single bad disease season can wipe out a year of income, that's transformative.
The bigger picture
Marshell matters beyond its flavour profile. In a world where climate change is shrinking the viable growing area for Arabica coffee, and where diseases like leaf rust are becoming more aggressive, finding varietals that taste incredible and can take a beating is critical. Most disease-resistant cultivars in the Catimor family have historically traded cup quality for resilience. Marshell, whatever its exact genetic story turns out to be, seems to have cracked that compromise.
It's also a reminder that some of the most exciting developments in speciality coffee aren't happening in well-funded research labs. They're happening on three-hectare farms at 1,700 metres, discovered by farmers who are paying attention to what's growing around them. Grimanés Morales Lizana didn't set out to create a new varietal. She just noticed something different, watched it survive when nothing else would, and had the instinct to nurture it.
Nearly thirty years after she first spotted that odd-looking tree, Marshell is one of the most talked-about varietals in Peruvian coffee. Seeds are spreading across Cajamarca. Roasters around the world are getting their first lots. And the research that will eventually pin down its genetics is, slowly,
Marshell cups beautifully, grows tough, and carries a story most varietals would envy. It's already one of Peru's most celebrated coffees, and there's more to come.
If you spot it on a menu, don't overthink it. Order it. Caramel and cola spice up front, stone fruit through the middle, and an acidity that keeps shifting as the cup cools. You're drinking something that almost didn't exist. A varietal that survived because one farmer was paying attention.
The genetics will get sorted out eventually. The taste won't change either way.
catching up to what producers already know from experience. Marshell tastes extraordinary and refuses to die. In speciality coffee, that combination rarely comes in the same plant.
The verdict
Marshell cups beautifully, grows tough, and carries a story most varietals would envy. It's already one of Peru's most celebrated coffees, and there's more to come.
If you spot it on a menu, don't overthink it. Order it. Caramel and cola spice up front, stone fruit through the middle, and an acidity that keeps shifting as the cup cools. You're drinking something that almost didn't exist. A varietal that survived because one farmer was paying attention.
The genetics will get sorted out eventually. The taste won't change either way.
Quick varietal facts
Varietal: Marshell
Type: Believed to be a natural mutation of Bourbon (genetics not yet definitively confirmed; Catimor heritage also proposed)
Related to: Bourbon (probable parent)
Origin: La Lucuma farm, San Ignacio, Cajamarca, Peru. Spotted in 1997, propagated from 2011
Discovered by: Grimanés Morales Lizana
Optimal Altitude: 1,600–2,000m
Growth Habit: Distinctive leaf shape and tree structure that visibly differs from neighbouring Bourbon and Catimor plants
Cherry Colour: Red
Yield: Strong, with good cherry retention
Disease Resistance: Notably resistant to ojo de pollo (Mycena citricolor), coffee leaf rust, and Cercospora
Notable Recognition: Won 2019 Cup of Excellence Peru with 92.28 points; the first Peruvian COE winner using this varietal, and Grimanés was the first woman to win the competition in Peru
Currently Grown In: San Ignacio, Jaén, and La Coipa provinces of Cajamarca, Peru
Typical Cup Profile: Sweet, complex, silky. Caramel, cola spice, stone fruit and a clean acidity that can range from pomegranate to white grape to apple cider depending on the lot
Further reading
Global Coffee Report – New Varietal Wins Peru Cup of Excellence
Contemporaneous reporting from October 2019 on Grimanés's win, the cupping panel involved, and the runners-up. A useful primary source for the moment Marshell entered the international conversation.
Ozone Coffee NZ – Marshell: Peru's Most Exciting New Varietal
Our sibling roastery in New Zealand recently sourced a beautiful Marshell from Nima Juarez at El Roble. Their write-up goes deep on the producer side of the story.
World Coffee Research – Costa Rica 95
If you want to dig into the Catimor theory of Marshell's parentage, this is the profile of the cultivar most often suggested as a potential genetic match.
Interested in exploring Marshell's genetic relatives? Read more about its probable parent in our guide to Bourbon, and explore other natural Bourbon mutations like Caturra and Pacas.