Fazenda Daterra is one of the most controlled Brazilian estates — systematic lot separation, meticulous natural drying — and offering the same lot at two roast levels makes the chemistry comparison explicit. Where the light version preserves fermentation volatiles and acid brightness, the medium roast trades those for a different set of compounds built by the Maillard reaction.
Bourbons in the medium roast range undergo extended development past first crack. During this development phase, chlorogenic acids continue breaking down — lower CGA levels mean reduced perceived bitterness and acidity. Simultaneously, the Maillard reaction builds melanoidins: high-molecular-weight browning compounds that account for up to 25% of brew dry solids and are responsible for the syrupy body and texture that a medium-roasted Bourbon produces. Extended MAI time before first crack gives Bourbon the structural body it's known for.
The sweetness in this cup isn't residual sugar. Sucrose is nearly 100% consumed by first crack at any roast level above light. What registers as sweet is entirely aroma-mediated: caramelization produces furanones and maltol that activate retronasal sweetness, and Maillard compounds suppress sour character, which your brain interprets as increased sweetness by comparison. Medium roasting hits the caramelization sweet spot — enough thermal development to generate those furanone compounds without pushing into pyrolysis territory where the sugars tip toward bitter, ashen character.
At 1,143 meters in the Cerrado, Bourbon isn't growing at altitude that produces the complexity of high-grown Andean coffee. But natural processing builds body and fruit character that the terroir alone wouldn't generate, and medium roasting develops the Maillard structure to integrate it — a classic Brazilian profile in its most deliberate form.
The 4°C temperature drop — split equally between medium roast and natural processing — reflects two convergent forces. Medium roast has already broken down enough CGAs that you don't need high heat to push extraction; natural processing has added body-forward oils that a cooler pour better preserves. The Chemex's 20-30% thicker paper filter is the decisive variable here: it strips those natural-process oils and fines, translating this Bourbon's Maillard-built body into a clean, articulated cup rather than a heavy one. At 1,143 meters in the Cerrado, this isn't a high-density bean — medium solubility means the slightly coarser grind (+15μm from baseline) prevents over-packing the bed. The 3:30–4:30 window gives contact time for the caramelization compounds to extract fully while the thick filter does the clarifying work.
Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. This medium-roast Bourbon at Cerrado altitude has medium solubility — if the brew runs too fast, you're stopping in the acid-dominant early extraction phase before Maillard sweetness extracts.
flat: Grind finer by ~22μm and raise temp 2°C; verify water mineral content. Flat cups on this bean usually mean underextraction — the natural-process complexity and caramel sweetness are locked in if surface area or temperature is insufficient. Soft water compounds this.
The V60's open, single-hole drain is the most flow-rate-sensitive brewer in this lineup, which is why the +15μm coarser grind delta matters: natural processing slightly changes how the bean extracts than washed, and packing a V60 too tight with a natural Bourbon risks uneven flow and channeling. The paper filter still strips the oils that natural drying deposited in this bean, but the V60 does it with less filtration resistance than Chemex — expect slightly more texture. Temperature at 90°C is conservative for a medium roast: the lower CGAs of the medium-roast Bourbon mean less bitter extraction risk, so the temp reduction targets the natural-process fermentation character, keeping those volatile aromatics intact rather than accelerating their evaporation.
Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. On a natural-process Bourbon at medium roast, sourness in the V60 usually means fast drain — increase resistance with a finer grind to keep water in contact with the bed longer.
flat: Grind finer by ~22μm and raise temp 2°C; check water minerals. Flat on this bean means the caramelized sweetness and nutty Maillard compounds aren't extracting. Higher temp and finer grind together push past the extraction plateau.
The Kalita Wave's flat-bed geometry creates more even water distribution than a conical dripper — every ground sees similar contact time, which matters for this Cerrado Bourbon because medium solubility beans benefit most from uniform extraction rather than high extraction rate. The recipe sits at a slightly wider ratio (1:16.5–1:17.5) compared to V60, tuned to the Wave's characteristic balance. Natural processing added fruit-forward volatiles to the Bourbon base, but the paper filter prevents those from becoming oily or heavy. At 90°C, the Wave's typically forgiving pulse pours allow good temperature stability — especially relevant since slurry temperature in most drippers runs 10–15°C below kettle temperature, making the already-conservative 90°C appropriate for this roast level.
Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. The Wave's flat bed is forgiving, but underextraction still shows as sourness. This Bourbon's medium solubility means acid compounds outpace sweetness if contact time is too short.
flat: Grind finer by ~22μm and raise temp 2°C; check water mineral content. The Wave's even extraction means flat cups point to global underextraction — not channeling. Finer grind and higher temp both increase solubles yield from this medium-roast Bourbon.
The AeroPress recipe drops to 81°C — a 9°C reduction from filter methods — and this is intentional science, not caution. The AeroPress extracts under pressure, compressing contact time to 1–2 minutes total. At 81°C, the rate of CGA extraction is reduced, which is a feature here: medium-roast Bourbon already has higher solubility than a light roast, so the temperature reduction prevents a short, fast brew from over-concentrating the bitter end of that range. The paper filter at this concentration (1:13 ratio) strips the natural-process oils, keeping fruit clarity intact. The +15μm coarser delta versus baseline prevents clogging during the pressurized press. This bean's medium solubility means the concentrated ratio does the heavy lifting without requiring brute-force extraction parameters.
Troubleshooting
strong: Decrease dose 1g or add 15g water. The AeroPress's 1:13 ratio is already concentrated — this medium-roast Bourbon has enough Maillard body that slight dilution rarely loses character. Adjust ratio before rebuilding the full recipe.
bitter: Grind coarser by ~22μm and drop temp 1°C. AeroPress pressure can push extraction fast. With this natural Bourbon, bitterness means dry distillates are extracting — coarser grind reduces surface area and slows the extraction rate under pressure.
The Clever Dripper is a hybrid — full immersion like French press, but it drains through a paper filter. For this natural Bourbon, that combination is significant: the immersion phase builds body from the medium-roast Maillard structure, while the paper filter strips the natural-process oils that would otherwise make the cup heavy. The result sits between French press richness and V60 clarity. At 90°C and 3–4 minutes, the Clever's sealed bed creates more even saturation than a pour-over — every particle sees the same water concentration throughout the steep. The 1:16 ratio is slightly more dilute than V60 to account for the extended contact time in immersion, which pushes extraction further along the sweetness curve for this medium-solubility Bourbon.
Troubleshooting
strong: Reduce dose 1g or add 15g water. The Clever's full immersion means all solubles are in contact the entire steep. This medium-roast Bourbon extracts efficiently — slight over-dosing reads immediately as overstrength.
bitter: Grind coarser by ~22μm and drop temp 1°C. Bitterness in the Clever Dripper usually means over-extraction during the steep. For this natural Bourbon, coarser grind reduces the extraction rate and keeps the cup in the dark chocolate sweetness zone rather than pushing into dry distillates.
Espresso with this natural Bourbon is a study in mismatch management. The 77/100 score reflects a real tension: natural processing produces volatile fermentation-derived aromatics that espresso's 9-bar pressure and high concentration amplify unpredictably. The recipe drops to 89°C — still 1°C lower than pour-over methods — to reduce the rate of CGA extraction at high pressure. The 1:2 ratio (19g in, 38g out) is a classic Italian-style output; the extended ratio from baseline (+0.5) gives more time for the Bourbon's caramel and roast-developed sweetness to build the shot. At 1,143 meters, this isn't the densest Brazilian Bourbon, so the grind is calibrated slightly coarser (+15μm) to prevent over-channeling at pressure.
Troubleshooting
strong: Reduce dose 1g or add 15g to output. Espresso concentrates all this natural Bourbon's Maillard sweetness and fermentation character simultaneously — the rich body can make shots taste stronger than the 1:2 ratio alone suggests.
sour: Grind finer by ~10μm and raise temp 1°C. Sour espresso means the shot is channeling or running short. At 89°C, tighter grind distributes water more evenly through the puck, extracting past the early acid-dominant phase.
The moka pot produces 1.5–3 bar pressure — enough to push hot water through compacted coffee but nowhere near espresso's 9 bar. This lower pressure, combined with steam driving extraction, means the natural-process oils from this Bourbon pass freely through the metal filter. At 68/100, the mismatch comes from that oil passage: natural drying builds lipid compounds that, unfiltered, create heaviness competing with the chocolatey Maillard character you want from a medium-roast Bourbon. The recipe calls for 96°C water in the base chamber — at moka pot pressure, the extraction temperature at the basket is lower, which partially offsets the lack of a paper filter. The +15μm coarser grind ensures the basket doesn't over-compact with steam pressure.
Troubleshooting
strong: Reduce dose 1g or add 15g water. Moka pot produces 2–3× coffee strength compared to filter methods. This natural Bourbon's oils add apparent richness on top of TDS — diluting slightly before drinking often resolves overstrength without losing character.
sour: Grind finer by ~22μm and raise temp 1°C (in base water). Sour moka pot shots usually mean grind is too coarse and water passes before extraction completes. Pre-boiled water in the base prevents steam from slow-cooking grounds before extraction pressure builds.
The French press is the most direct expression of this natural Bourbon's oil content — the metal mesh lets everything through, including the lipids deposited during natural drying and the insoluble fines that paper filters would catch. That's the trade-off: more body, more texture, but also the potential for those oils to amplify heaviness over clarity. At 92°C and 1:15 ratio, the recipe reflects the -4°C total modifier from the standard French press temperature, with immersion brewing's longer contact time compensating for the reduced thermal energy. The 4–8 minute window is wide by design; this Cerrado Bourbon at medium roast isn't fragile, and longer steeps extract the roast-developed body compounds that make French press the highest-body brewer in this lineup.
Troubleshooting
strong: Reduce dose 1g or add 15g water. French press has no ongoing filter resistance — all solubles extract freely. This natural Bourbon's oils make it taste stronger than TDS alone indicates, so dilution resolves overstrength efficiently.
bitter: Grind coarser by ~22μm and drop temp 1°C. French press with natural-process oils can amplify bitterness when overextracted. The coarser grind at 1,015μm baseline slows extraction; going coarser protects against dry distillate extraction.
Cold brew with this natural medium-roast Bourbon gets a 64/100 — the bean works, but the method doesn't fully leverage what makes it interesting. Cold water extracts fewer acids than hot brewing — research shows 28–50% fewer titratable acids at similar pH. For a medium-roast natural Bourbon where the appealing compounds are caramel sweetness and Maillard-derived body, cold water's limited solubility means you get body but not the full developed sweetness the medium roast built. The 80g/560g concentrate ratio at 915μm grind targets 12–18 hours, allowing enough time for the heavier compounds to develop. Natural-process fermentation character that cold-brew temperatures preserve is actually the strongest argument for using this method.
Troubleshooting
flat: Grind finer by ~22μm and steep in slightly cooler water (not warm). Flat cold brew on a medium-roast natural Bourbon means the caramel and melanoidin compounds aren't extracting. Finer grind increases surface area to compensate for cold water's reduced solubility.
strong: Reduce dose 1g or add 15g water to the concentrate. Cold brew concentrates are designed to dilute 1:1 before drinking. This natural Bourbon's oil content makes the concentrate read very rich — dilute to taste rather than drinking straight.