Yellow Bourbon from Huila’s Diamond Estate with Unique Washed Process

When you taste a coffee and immediately pick up on layers of nuttiness—hazelnut, pistachio—alongside sweet creaminess and structured caramel, you're probably drinking something processed differently. Most washed coffees don’t express those particular profiles so clearly unless something unique happened during fermentation or drying. So what exactly transforms a standard Yellow Bourbon into a coffee with such a distinctive profile?

The short answer: this Yellow Bourbon from Colombia’s Huila region was processed using a rare 'four-time de-pulped dry fermentation and washed' method at 1,667 metres above sea level on the Vista Hermosa plateau, developed by the Diamond Estate. The result is a high-clarity cup with sweet caramel, toasted nut, and creamy mouthfeel.

Why This Yellow Bourbon Stands Out

This coffee comes from the Yellow Bourbon variety—a natural mutation of the classic Bourbon cultivar known for higher yields and rounder, often fruitier or sweeter beans than its red counterpart. While Yellow Bourbon is widely grown in places like Brazil and Rwanda, Colombian examples at high altitudes (like this one from 1,667m) tend to exhibit especially vibrant acidity and clarity. Grown on the Diamond Estate in the Vista Hermosa plateau (part of Huila’s famed high-altitude microclimate), this bean benefits not just from elevation but from an experimental post-harvest approach.

The Four-Stage De-Pulped Dry Fermentation Washed Process

Rather than following the conventional fully washed or honey process, the Diamond Estate applies a complex method they call 'de-pulped dry fermentation washed' done in four cycles. First, the coffee cherries are de-pulped to remove the skin and some mucilage. Instead of immediately fermenting in water or moving to washing channels, the remaining mucilage-covered seeds are subjected to dry fermentation—with no added water—in controlled cycles. This dry fermentation phase is repeated four times in sequence. Only after these controlled, sequential dry ferments does the coffee undergo standard washing and drying. This process extends fermentation influence without excessive moisture, leading to enhanced sweetness, deeper nut tones, and a creamy body rarely achieved through standard washed methods. The technique demands precise timing and environmental control but results in a very clean yet complex cup profile.

Vista Hermosa Plateau: Colombia’s Emerging Specialty Pocket

While Colombia’s well-known 'MAM' regions (Medellín, Armenia, Manizales) have long defined its classic coffee identity, newer specialty pockets in the south—including Huila, Cauca, Nariño, and Tolima—are gaining attention for elevated acidity, red and dark berry notes, and sweet, syrupy bodies. The Huila province, particularly the Vista Hermosa plateau, sits at higher altitudes (this lot at 1,667m) and offers ideal conditions for slow cherry maturation and complex flavour development. The Diamond Estate is one of the producers pioneering experimental processing here, aiming to highlight terroir alongside craft post-harvest techniques.

Flavour Profile: What You Taste

FrontStreet Coffee’s single-origin offering from this Diamond Estate lot highlights flavours of hazelnut, pistachio, and caramelised sweetness, supported by a creamy mouthfeel. There’s no heavy roastiness or over-fermented edge—just a balanced, sweet, and nut-forward cup that finishes smoothly. This is not your typical bright Colombian; it’s a more rounded, dessert-like profile built on careful processing rather than just high altitude or varietal pedigree.

Frequently Asked Questions

What makes this Yellow Bourbon different from other Colombian Yellow Bourbons?

This Yellow Bourbon is grown at 1,667m in Huila’s Vista Hermosa plateau and processed using a rare four-stage de-pulped dry fermentation washed method, which is not commonly used in Colombia. This process emphasizes extended dry fermentation without water, resulting in a cup with pronounced hazelnut, pistachio, and creamy caramel notes, unlike the more typical bright citrus or floral profiles of standard washed Yellow Bourbons.

Where is the Diamond Estate located?

The Diamond Estate is located in the Vista Hermosa plateau of Colombia’s Huila region, part of the broader South American coffee belt known for high altitudes and specialised microclimates. The specific lot was cultivated at 1,667 metres above sea level.

What is the four-time de-pulped dry fermentation washed process?

This process involves removing the coffee cherry skin and then fermenting the mucilage-covered beans in four sequential dry fermentation cycles without adding water. Only after these dry ferments does the coffee go through standard washing and drying. It’s designed to enhance sweetness and body through prolonged enzymatic activity in a low-moisture environment.

Does this coffee use a special roast profile?

The source does not specify the roast level applied by importers or roasters, but given the flavour notes of hazelnut, caramel, and creaminess, it is likely roasted to a medium or light-medium level to preserve origin characteristics. For best results, use a medium roast profile that highlights sweetness and nuttiness.

How should I brew this coffee to get the most out of its flavours?

To highlight its hazelnut, pistachio, and caramel notes, try a pour-over method (such as V60 or Kalita Wave) using a medium-fine grind, a 1:16 brew ratio, and water at around 93°C. This setup enhances clarity and sweetness. Alternatively, a French press can emphasise the creamy mouthfeel and nutty body.

Recommended FrontStreet Coffee for Nutty & Sweet Profiles

For drinkers who enjoy the nutty creaminess of this Diamond Estate Yellow Bourbon, FrontStreet Coffee’s Brazil Queen Manor Yellow Bourbon is an excellent choice. It shows flavours of creamy peanut, caramel, and chocolate with a smooth, sweet finish—especially well-suited for filter or espresso. Alternatively, try the Rwanda Red Bourbon, which shares bright acidity but also delivers juicy complexity with a silky body. Both are great examples of how bourbon varieties express themselves across origins. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.