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http://www.thetaridgecoffee.com/

Theta Ridge Coffee LLC, 6879 Enterprise Drive, Suite 200, South Bend, IN (2026)

05/29/2026

Here’s one for the roasting log: Managing thermal conductivity in high-altitude, high-density washed heirlooms.

At elevations between 1900 and 2000 meters in the Sidama zone, the slow maturation of coffee cherries yields extremely dense cell structures. These landrace heirloom varieties represent some of the oldest genetic lineages of Coffea arabica, possessing natural resilience to pathogens like Hemileia vastatrix without the need for modern hybridization.

The intensive washing and triple-sorting processes utilized for this specific lot ensure strict uniformity in screen size, which is critical for consistent heat transfer within the drum. High-elevation cultivation directly impacts the bean's glucose content, demanding a precise application of thermal energy to fully articulate the intrinsic floral and citrus characteristics without scorching the cellular matrix.

**The Charge and Airflow Strategy**
Due to the profound density of this triple-sorted lot, thermal conductivity relies on a robust initial heat application to pe*****te the core. Target a charge temperature strictly between 385°F and 395°F, maintaining closed or minimal airflow through the turnaround to build necessary conductive momentum. Once the bean mass transitions from green to yellow, engage moderate airflow to efficiently clear moisture and prevent baking during the critical drying phase.

**The Maillard Phase**
As the roast enters the Maillard phase, monitor the exhaust for sensory cues shifting from sweet hay to toasted malt and raw peanut. To properly caramelize the elevated glucose content and develop the target maple syrup-like body, maintain a steady, declining Rate of Rise (ROR) of roughly 12°F to 15°F per minute. A stalled ROR in this phase will inevitably mute the complex spicy and sweet citrus aromatics inherent to Sidama coffees.

**The First Crack and Finish**
The dense structure of these heirloom beans dictates a sharp, authoritative snap during the endothermic transition of First Crack. To preserve the wild, sweet lemon and delicate floral tones without sacrificing the clean finish, manage the development time with absolute strictness. Execute the drop exactly 85 seconds after the peak of First Crack, targeting a precise City+ roast degree to balance the acidity and body.

Secure this Ethiopian Sidama green coffee here: https://shop.thetaridgecoffee.com/

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

05/27/2026

Here’s one for the roasting log: Managing thermal conductivity in irregular, dry-processed heirloom varietals.

East Harrar, specifically the Village of Mesela, sits at a formidable 1800 meters. The arid climate and sheer lack of water infrastructure in this region dictate a strict, unavoidable adherence to traditional dry-processing methods. This produces a raw material that behaves quite differently in the drum compared to washed high-altitude coffees.

These Ethiopian heirloom varietals possess deep genetic roots, offering intrinsic resilience to agricultural threats such as Hemileia vastatrix. Because the region relies entirely on the natural process, the extended cherry contact during the sun-drying phase highly concentrates the glucose content within the seed. This chemical makeup demands careful manipulation of heat to avoid scorching the cellular structure before core development is achieved.

**The Charge and Airflow Strategy**
Approach this raw material with specific attention to thermal conductivity. The irregular bean sizing and density of unassorted heirloom naturals require a gentle thermal soaking period. Execute the charge between 375°F and 385°F, keeping airflow restricted to a minimal draw during the initial drying phase to protect the volatile sugars.

**The Maillard Phase**
As the batch progresses into the yellowing stage, expect distinct sensory markers shifting from dry straw and raw peanuts to toasted malt and dehydrated dark fruit. A controlled Rate of Rise (ROR) is absolutely critical here to fully develop the heavy, syrupy body characteristic of a traditional Harrar. Maintain a steadily declining ROR, targeting a stabilized descent of 12°F to 14°F per minute through the middle of this phase.

**The First Crack and Finish**
The endothermic transition will announce itself with a somewhat scattered but authoritative snap, which is typical of mixed-screen heirloom lots. To preserve the complex acidity and wild berry characteristics, execute the pull precisely 90 seconds after the peak of the first crack. Drop the batch at a strict City+ degree to balance the inherent wildness of the natural process with structural clarity.

Secure these Ethiopian Harrar green beans for the production schedule: https://shop.thetaridgecoffee.com/

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

05/25/2026

Remembering, Honoring, and Grateful. 🇺🇸☕
Today, the team at Theta Ridge Coffee pauses to honor the brave men and women who made the ultimate sacrifice in service to our country. Their courage and dedication are the foundation of the freedoms we enjoy every single day.
As you gather with family, friends, and neighbors this weekend—whether you’re firing up the backyard grill or enjoying a quiet morning on the porch—we hope your day is filled with meaningful reflection and community.
We are incredibly grateful for our freedom, our families, and the wonderful coffee community we get to serve.
From our family to yours, have a safe and blessed Memorial Day.

05/20/2026

☕️ Meet the ultimate game-changer for coffee roasters, green buyers, and serious home geeks. The Nucleus LINK Sample Roaster packs elite, data-driven profiling into a sleek, highly portable powerhouse. Developed in collaboration with Kaffelogic, this little machine is built to take your roasting to the next level—whether you're in a professional cupping lab, traveling to origin, or experimenting in your kitchen.

Here is why the industry is buzzing about it:

📈 41 Preloaded Roast Curves – Crafted by award-winning coffee professional Sam Corra of Sydney’s legendary ONA Coffee.

🧠 Density-Driven Profiling – The companion app removes the guesswork, using your green coffee's density to select the absolute ideal roast profile.

🎒 Built to Travel – It ships with a rugged, shock-absorbent, and waterproof travel case, a dosing cup, and a coffee tray.

⚖️ Perfect Sample Size – Efficiently roasts 50g to 100g batches, so you never waste precious lots.

From sourcing trips to Sunday mornings, consistency has never been this portable. 🌍✨

See it now on our website https://shop.thetaridgecoffee.com/products/link-roaster?variant=40611218128985

05/20/2026

☕️ Meet the Nucleus LINK Sample Roaster, a game-changer for coffee roasters and home enthusiasts.

Why the buzz?

📈 41 Preloaded Roast Curves by award-winning Sam Corra.
🧠 Density-Driven Profiling via companion app.
🎒 Travel-ready with rugged case and accessories.
⚖️ Efficiently roasts 50g to 100g batches.

Consistency has never been this portable! 🌍✨

See it: https://shop.thetaridgecoffee.com/products/link-roaster?variant=40611218128985

05/18/2026

Here is one for the roasting log: Managing thermal conductivity in high-altitude, dense washed coffees. The Costa Rica Tarrazu La Pastora presents a rigid cellular matrix requiring strict thermodynamic discipline.

Cultivated in the interior mountains of the Tarrazu region between 1200 and 1800 meters above sea level, this coffee exemplifies traditional Central American agricultural heritage. High-altitude growth extends the maturation cycle, resulting in an exceptionally dense seed. This elevated density dictates the entire approach to heat application in the drum.

Historically, the region has implemented stringent agronomic practices to combat pathogens like Hemileia vastatrix while maintaining soil viability. The washed processing method utilized here relies heavily on the high glucose content developed during the slow maturation phase to facilitate precise fermentation. The result is a clean, heavy-bodied profile capable of intense citrus and tropical fruit expression, provided the roast architecture is flawless.

**The Charge and Airflow Strategy**
A charge temperature between 395°F and 405°F is mandatory to pe*****te the dense cellular structure of these high-altitude beans. Keep initial airflow restricted during the drying phase to build internal pressure and heat momentum. As the bean mass approaches 300°F, increase airflow to clear early moisture and prevent stalling.

**The Maillard Phase**
Approaching the color change, expect distinct sensory cues shifting from wet hay to toasted malt and raw peanuts. A steadily declining Rate of Rise (ROR) is critical here to build the signature well-rounded body associated with Tarrazu regional coffees. Target an ROR of 12°F to 15°F per minute through this phase, avoiding any crashes that would bake the interior.

**The First Crack and Finish**
The endothermic transition into First Crack will announce itself with an authoritative snap. At this junction, push airflow to maximum capacity to evacuate smoke and prevent baked-in roast defects. To preserve the bright acidity and tropical fruit notes, execute the drop exactly 90 seconds after the peak of First Crack, targeting a precise City+ roast degree.

Procure the Costa Rica Tarrazu La Pastora green inventory here: https://shop.thetaridgecoffee.com/

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

05/15/2026

Here is one for the roasting log: Managing thermal conductivity in high-altitude, dense Ugandan Arabica.

The Mt. Elgon region presents a fascinating study in agricultural heritage. Cultivated on the slopes of East Africa's oldest volcano, the Bududa variety—historically traded under the Bugisu nomenclature—traces an intricate genetic lineage from the Ethiopian highlands through Malawi before establishing its roots in early 20th-century Uganda.

The volcanic loam provides an exceptional mineral matrix, resulting in dense cell structures requiring precise heat application. Historically, this region has also demanded rigorous agronomic practices to defend against Hemileia vastatrix, forcing farmers to cultivate highly resilient, nutrient-dense cherries. This structural resilience dictates exactly how heat pe*****tes the bean matrix.

**The Charge and Airflow Strategy**
High-altitude density necessitates aggressive initial heat application to establish proper thermal momentum. Charge the drum between 385°F and 395°F, utilizing minimal airflow during the initial turnaround to trap ambient environmental heat. Increase airflow to a moderate setting precisely at the yellowing stage to clear moisture effectively and prevent stalling before the endothermic transition.

**The Maillard Phase**
As the chemical browning commences, expect distinct sensory cues transitioning from raw vegetation to toasted malt and raw peanuts. This phase is critical for breaking down complex carbohydrates and maximizing glucose content for later caramelization. Maintain a steadily declining Rate of Rise (ROR), targeting a drop of no more than 12°F to 15°F per minute to develop a structurally sound, yet light body.

**The First Crack and Finish**
The dense cellular structure of the Bududa bean will fracture with an authoritative snap. As the physical structure gives way to exothermic heat release, increase the fan speed to clear chaff and exhaust smoke. To preserve the delicate floral aromatics and mild citrus notes, execute a precise pull time of 90 seconds after the peak of first crack. Drop the batch at a City+ roast degree to balance the inherent nutty and milk chocolate profile without overwhelming the delicate acidity.

Procure green inventory for the roasting schedule here: https://shop.thetaridgecoffee.com/

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

05/13/2026

Here’s one for the roasting log: Navigating the thermal conductivity of high-sucrose, pulped natural Cerrado lots.

Daterra represents a pinnacle of agricultural precision in the Cerrado and Mogiana regions of Brazil. By utilizing selective mechanical harvesting, the estate achieves a level of ripeness uniformity rarely seen in large-scale production. This specific lot from the Sweet Collection is a testament to meticulous post-harvest management.

The region’s history of combating *Hemileia vastatrix* through innovative cultivar selection and soil nutrition has resulted in a bean profile with significant glucose content. The pulped natural (semi-washed) process preserves the integrity of the mucilage, which demands a sophisticated heat application. Proper management is required to avoid scorching the exterior before the core reaches the endothermic transition.

**The Charge and Airflow Strategy**
Begin with a charge temperature between 385°F and 395°F, depending on the machine’s thermal mass. Maintain moderate airflow during the initial drying phase to efficiently remove moisture without stripping the bean of its latent heat. The goal is to establish a steady momentum that pe*****tes the center of these 3,800-foot altitude beans without excessive drum speed.

**The Maillard Phase**
As the beans transition from green to yellow, sensory cues will shift from raw vegetation to toasted malt and raw peanuts. Monitor the Rate of Rise (ROR) closely during this window to develop the substantial body characteristic of the Mogiana region. A controlled deceleration of the ROR here is critical to catalyze the complex sugars into the notes of dark chocolate and caramel.

**The First Crack and Finish**
Expect an authoritative snap rather than a soft muffled crack, signaling the rapid release of CO2 and water v***r. For a City+ roast that preserves the delicate mandarin and floral acidity, aim for a pull time approximately 90 to 105 seconds after the peak of the first crack. Extending the development beyond 120 seconds will shift the profile toward bittersweet chocolate, which is ideal for a traditional espresso base.

**Technical Specifications**
Origin: Brazil
Region: Cerrado, Mogiana
Processing: Pulped Natural (Semi-washed)
Altitude: 3,800 Feet
Profile: Mandarin, Dark Chocolate, Caramel

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

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

05/11/2026

Here’s one for the roasting log: Navigating the thermal inertia of the concentrated Bourbon peaberry.

Daterra Estates represents the pinnacle of Brazilian agricultural engineering. This specific selection originates from the Bourbon lineage—a variety historically prized for its sweetness but susceptible to *Hemileia vastatrix* if not managed with the precision found in the Cerrado Mineiro. The peaberry, or *caracol*, represents a botanical anomaly where only one seed fertilizes within the cherry, resulting in a dense, spherical morphology. This physical structure fundamentally alters thermal conductivity during the endothermic transition compared to traditional flat-bean lots.

Because the peaberry is more aerodynamic and dense, it requires a nuanced approach to heat application. The pulped natural (semi-washed) processing ensures high glucose content remains on the parchment during drying, which demands precise control during the caramelization phase to avoid acridity.

**The Charge and Airflow Strategy**
Target a charge temperature between 380°F and 390°F. Utilize moderate airflow during the initial drying phase to prevent surface scorching on the smaller, rounded surface area of the peaberry. The objective is to achieve a uniform internal temperature rise, ensuring the core of the bean is prepared for the Maillard reaction without over-exposing the exterior.

**The Maillard Phase**
Monitor for sensory cues ranging from raw peanuts to toasted malt. As the beans transition from yellow to light brown, manage the Rate of Rise (ROR) to ensure a steady, declining curve. This phase is critical for body development; a controlled descent here allows the complex sugars to develop into the deep chocolate notes for which the Daterra Collection is known.

**The First Crack and Finish**
Expect an authoritative, rhythmic snap rather than the muffled sounds of lower-density Brazils. To preserve the soft acidity and subtle fruit notes, aim for a development time of 95 to 105 seconds after the onset of First Crack. Pulling the roast at a City+ level prevents the destruction of the delicate berry nuances while maximizing the bean's inherent sweetness.

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

https://shop.thetaridgecoffee.com/

05/05/2026

**Here’s one for the roasting log: Navigating the thermal inertia of high-density Ethiopian heirloom seeds without sacrificing enzymatic complexity.**

The Guji region, once categorized under the broader Sidamo umbrella, has earned its reputation through extreme altitude and ancient genetics. These heirloom varietals are grown between 1,900 and 2,000 meters, resulting in a bean with immense physical density. This specific lot has undergone triple sorting, a rigorous process that ensures the physical uniformity necessary for a precise, professional-grade roast.

**Roaster’s Technical Notes**

**The Charge: Heat and Airflow Strategy**
Due to the high altitude and density of these seeds, an aggressive initial heat application is required to pe*****te the core. However, the washed process makes the exterior susceptible to tipping if the drum temperature is excessive at the drop. Start with a higher charge temperature but maintain moderate airflow through the drying phase to build sufficient momentum without scorching the delicate parchment remnants.

**The Maillard Phase: Sensory Cues**
As the beans transition from green to yellow, the Rate of Rise (ROR) must be managed with precision. Watch for the color shift toward a toasted tan. The olfactory cues during this phase are distinct: the scent of toasted malt will emerge, followed by a sharp transition into baking spices. Maintaining a steady, slightly declining ROR here is vital to develop the maple syrup-like body without baking out the volatile floral compounds.

**First Crack: The Authoritative Snap**
The first crack in these high-density Ethiopians should manifest as an authoritative, rapid snap rather than a muffled thud. Once the crack is fully engaged, begin a controlled reduction in heat to extend the development time slightly.

To preserve the wild sweet lemon and floral tones, the pull should occur approximately 90 to 110 seconds after the onset of the crack, depending on your machine's cooling capacity. This ensures a clean finish while allowing the spicy aromatics to fully articulate.

**Technical Specifications**
Origin: Ethiopia, Guji
Altitude: 1900 - 2000M
Varietals: Heirloom
Process: Washed, Triple Sorted
Profile: Medium body, Citrus, Maple, Floral

Further technical data and green coffee sourcing available at:
ThetaRidgeCoffee.com

Theta Ridge Coffee LLC

05/29/2026

05/27/2026

05/25/2026

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05/05/2026

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Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm