Peru German Cubas Perez

The V60 at 430μm — the finest pour-over grind for this bean — compensates for the altitude-driven density that makes this Caturra-Typica blend resist extraction. Extraction rate depends on particle surface area and the concentration difference between the bean surface and the water. Unlike the Peru Flores Gesha (which gets a 50μm rather than 70μm finer grind due to its Ethiopian Landrace genetics and faster extraction), this Caturra-Typica lot gets the full 70μm reduction because both Caturra and Typica are Bourbon-group varieties with higher bean density than Gesha. The oolong tea character — a combination of very light body, phenolic presence, and Typica's characteristic clean-sweet base — expresses best in the V60 when pour technique maintains even distribution across the bed. Oolong tea in coffee comes partly from incomplete extraction of larger melanoidin molecules, which means slight underextraction can actually produce the tea-like character. The V60's faster flow relative to the Kalita allows precise control of contact time.

The Kalita Wave at 460μm and 94°C for this lot represents the standard altitude-adjusted recipe without any variety-specific modifiers — Caturra and Typica don't trigger the -1°C Gesha adjustment. The flat-bed geometry is particularly appropriate for a bean with a high sour score (75 in the Chemex, 75 in the V60), because uneven water distribution in a cone brewer would produce more extraction heterogeneity — some particles over, some under — which is precisely the condition that makes a high-acid, high-altitude bean taste simultaneously sour and flat. The Wave's triple-hole drain and flat bed minimize that heterogeneity. The clove note requires even extraction to read as spice rather than phenolic: the clove character develops in the middle-to-late phase of extraction, and uneven beds that underextract some particles will produce cups where the blackberry dominates but the clove register never develops. Consistent 50g pours with a 35-second bloom at full 50g saturation will produce the most complete extraction.

The AeroPress brews this Cajamarca Caturra-Typica at 85°C with a 330μm grind — 70μm finer than standard, accounting for both the light roast density and the high altitude. The 1–2 minute immersion window is short, but the finer grind ensures the AeroPress extracts the blackberry, oolong tea, and clove character efficiently. The 1:12.5 ratio produces a concentrate that compresses the blackberry and raisin notes — which suits the warm spice character particularly well, since clove and spice notes read best at higher concentrations. The pressure-assisted plunge finishes extraction quickly and cleanly, leaving the oolong tea character sharp and defined rather than fading into residual bitterness from extended contact.

For a high-altitude, high-acid bean like this, the Clever Dripper's immersion-before-drain approach offers a distinct advantage: the full-contact steep ensures every particle extracts simultaneously, which reduces the variance in per-particle extraction that continuous pour-over can produce for a high-density bean. A V60 pour that's slightly inconsistent on a standard bean might produce a marginally less bright cup — the same inconsistency on this 2,059m Caturra-Typica lot with its elevated citric and malic acid means some particles over-extracting into bitterness while others stay in the sour zone. The Clever's 3-4 minute steep at 460μm and 94°C produces even extraction without demanding perfect pour technique, making the blackberry and raisin notes more reliably reproducible. The oolong tea character — which depends on phenolic compounds in the middle extraction phase — benefits from the full-contact steeping: every gram contributes phenolics evenly rather than the gradient concentration that pour-over produces.

This bean carries an exceptionally high sour score of 80, which is the clearest indication of what espresso does to a 2,059m light-roasted Caturra-Typica: it concentrates everything, including the exceptional organic acid load from extreme altitude. Under 9 bar, citric and malic acids from this Cajamarca lot extract within the first 10-15 seconds of the shot, and without adequate pre-infusion to saturate the puck, channeling produces an acidity spike in the early seconds that's intensely sour rather than bright. Pre-infusion at 2-4 bar for 5-7 seconds is not optional here — it saturates the dense Caturra-Typica bed evenly before full pressure. The 180μm grind and 1:2.4 ratio work together to pull extraction well into the sweetness range where blackberry translates to deep fruit espresso character and clove reads as warm spice in the finish. For light-roast espresso, expect a long ratio and patience with this shot.

The moka pot for this lot includes a temperature ceiling correction — limiting effective temperature to moderate the extraction of this very high-density bean. At 2,059m, this lot's extraordinary density means the moka's 1.5 bar pressure is fighting an exceptionally dense particle structure. At 280μm and 94°C in a moka pot, extraction rate is primarily driven by grind surface area rather than pressure — the 1.5 bar contribution to extraction is modest. The very high density explains why sourness is a consistent risk across all brew methods for this bean: dense beans extract their organic acids at comparable rate to less dense beans, but extract sweet Maillard compounds more slowly due to more intact cell walls. The moka pot's inability to generate adequate pressure compounds this — getting this Caturra-Typica lot fully extracted in a moka requires grind precision and proper temperature management.

The French press at 930μm for this bean is working against density: very high density at 2,059m altitude means the coarsest grind on this list is paired with the most resistant particles. This is why French press scores 76/100 while Chemex scores 96 — not because immersion is inherently problematic, but because the coarse grind required to prevent over-extraction in a 4-8 minute steep produces insufficient surface area for a very high density bean. The temperature ceiling at 94°C slightly reduces extraction rate further. In practical terms: the oolong tea character will be present but attenuated, the blackberry and raisin will express more completely (those acids extract efficiently even at coarse grind), and the clove note may be weak because the clove character requires finer particle surface area to extract adequately at coarse settings. Using Hoffmann's method with the extended settle period is especially valuable here — the longer settle time compensates somewhat for the extraction limitations by concentrating flavor in the liquid fraction.