Theta Ridge Coffee LLC

Here’s one for the roasting log: managing thermal conductivity in high-altitude dense cherry.

Nicaragua Café Diego originates from the Matagalpa region, a territory historically central to Nicaraguan coffee production since the mid-19th century. The unique microclimate, characterized by high altitudes and an established shade canopy, contributes to a protracted bean maturation period. This slow development fosters the dense cellular structure inherent to specialty-grade Strictly High Grown (SHG) beans. Such density necessitates a precise thermal energy application during roasting to ensure uniform internal development and optimal solute migration. The prevalent varietals in Matagalpa SHG, commonly Caturra or Catuai, are known for robust cellular integrity under these specific growing conditions.

Roaster’s Technical Notes:

* **The Charge and Airflow Strategy:** Initiate with a charge temperature between 390°F–395°F. Apply an initial airflow setting of 25-30% to facilitate conductive heat transfer. Increase airflow to 50-60% approximately 2:00-3:00 minutes into the roast, promoting convective transfer and maintaining bean mass temperature equilibrium to prevent surface scorching.
* **The Maillard Phase:** Observe sensory milestones including a transition from green to straw-yellow at approximately 4:00-5:00 minutes. Aromatics will evolve from grassy to toasted grain, culminating in baked bread notes signaling the conclusion of the Maillard reaction. Maintain Rate of Rise (ROR) between 18-22°F/min at the outset of Maillard (around 280°F Bean Temperature), gradually declining to 12-15°F/min by 360°F Bean Temperature. This ensures complex carbohydrate caramelization without premature pyrolytic degradation.
* **The First Crack and Finish:** First Crack is characterized by a distinct, moderately rapid succession of sharp snaps, indicating controlled internal pressure release within the dense bean structure. Target a development time ratio (DTR) of 18-20%, corresponding to a pull approximately 80-95 seconds post-First Crack initiation, typically between 398°F–402°F Bean Temperature. The objective is a City+ roast, preserving the intrinsic citric acidity and caramel sweetness.

https://shop.thetaridgecoffee.com/

Follow this page for weekly roasting logs and technical specifications on new arrivals.

Here’s one for the roasting log: Managing thermal conductivity in ultra-high-altitude, large-screen washed coffees.

Grown at an exceptional altitude of approximately 4050 meters above sea level in the Farallones de Cali region of the West Andes, this Colombian Supremo lot represents the pinnacle of traditional agricultural precision. The extreme diurnal temperature variation at this elevation dramatically slows cherry ripening, allowing the plant to concentrate high levels of glucose content within the seed.

Historically, cultivating Arabica at these extreme heights provided a natural environmental defense against pathogens like *Hemileia vastatrix*, though managing the physical density of the resulting bean requires strict thermodynamic control. Handpicked at peak maturity and processed using pristine mountain water for traditional wet fermentation, these uniform beans arrive in standard 154 lb. bags, requiring a deliberate thermal profile to pe*****te the large bean structure without imparting surface defects.

**The Charge and Airflow Strategy**
Charge temperature must be sufficient to pe*****te the dense cellular structure of this large screen size without scorching the bean face. Introduce the green coffee at 385°F to 395°F into a thoroughly pre-heated drum. Keep airflow low during the initial drying phase to optimize conductive heat transfer, gradually increasing air velocity as the bean transitions past the turning point to efficiently strip away ev***rating moisture.

**The Maillard Phase**
As the bean enters the yellowing stage, monitor sensory cues closely. Look for the distinct aromatic transition from raw peanuts to toasted malt. Maintain a steady, controlled Rate of Rise (ROR) of approximately 20°F to 22°F per minute through this zone to extend the Maillard reaction, which properly develops the internal chemistry to yield a balanced, medium body.

**The First Crack and Finish**
The onset of the primary endothermic transition will announce itself with a clear, authoritative snap. At the peak of First Crack, manage fuel application carefully to avoid an ROR crash, allowing the development to continue for exactly 90 seconds after peak acoustic activity. Pull the roast at a definitive City+ degree to preserve the soft cranberry-like acidity and refreshing cherry finish, while securing the foundational hints of cocoa.

Secure green inventory for the roasting bench here: https://shop.thetaridgecoffee.com/

Follow this page for weekly roasting logs and technical specifications on new arrivals.

Here’s one for the roasting log: Managing the low-density trap and diminished thermal conductivity in Monsooned Malabar processing.

The historical footprint of India’s coffee production is deeply intertwined with the devastation of Hemileia vastatrix in the late 19th century, forcing an agronomic shift toward more resilient cultivars. The modern monsooning process replicates the historic voyages of old, introducing a unique biochemical state where green Arabica beans are exposed to moisture-laden winds along the Malabar Coast. This intentional environmental exposure drastically alters the physical matrix, swelling the bean to nearly twice its size, reducing density, and modifying the baseline glucose content.

Because this structural expansion alters how heat moves through the bean, standard profiles will fail. Precision control over the thermodynamic cycle is required to unlock the characteristic profile of nutmeg, clove, cardamom, and soft tropical fruit.

The Charge and Airflow Strategy
Due to structural expansion and low bean density, high charge temperatures pose an immediate risk of surface scorching. Initiate the roast with a conservative charge temperature between 375°F–385°F. Maintain low to moderate airflow through the initial drying phase to allow uniform heat pe*******on despite the degraded thermal conductivity of the expanded cell walls.

The Maillard Phase
As the bean enters the Maillard phase, look for distinct sensory cues shifting from aromas of raw peanuts to toasted malt and warm baking spices. To develop the heavy, syrupy body essential for this origin, manage the Rate of Rise (ROR) to ensure a steady, gradual decline. A controlled deceleration throughout this phase prevents baking while allowing complex amino acid reactions to maximize the inherent sweetness.

The First Crack and Finish
Monsooned Malabar exhibits a delicate, highly subdued acoustic profile during the endothermic transition into first crack, producing a soft, muted rustle rather than an authoritative snap. Target a precise pull time of 90 seconds after the peak of first crack to preserve the delicate tropical fruit notes. Drop the batch at a solid City+ development stage to ensure the naturally softened acidity balances perfectly with the pungent undertones of pepper and cardamom.

Shop this coffee at:
https://shop.thetaridgecoffee.com/

Follow this page for weekly roasting logs and technical specifications on new arrivals.