Colombia Las Rosas

The Kalita Wave's balanced extraction geometry works well for a Caturra-Castillo blend because the two varieties likely have slightly different grinding characteristics after grinding — Caturra is a dwarf with medium-density beans, while Castillo (Sarchimor background, classified in the Introgressed group) has been documented to roast like a medium-density bean. The Wave's flat-bottom even water distribution minimizes channeling that could preferentially extract one variety over the other. This matters more for Las Rosas than for a single-variety lot because uneven extraction across variety types would produce the simultaneous sour-and-bitter character that Gagné identifies as the worst extraction outcome. Temperature (-1°C, 93°C) and grind (-20μm, 510μm) parallel the V60 with the slightly coarser setting compensating for the Wave's longer contact time.

The Chemex's thick paper filter extends its usual function here in a specific way: the Las Rosas cocoa powder finish is a roast-developed compounds — specifically roast-developed compounds and roast-developed compounds from leucine and isoleucine — that sits in the middle of the extraction. Paper filtration doesn't affect these water-soluble roast-developed compounds, only the oils. So the Chemex filter preserves the cocoa note while clarifying the dried cherry and date acids, creating the clearest possible expression of the Las Rosas terroir-variety combination. Temperature and grind calibration (-1°C, -20μm) ensure those roast-developed compounds have enough thermal energy to dissolve fully while preventing the bright fruit acidity from dominating. The thin troubleshooting score (55) is the highest of all brewers for this bean because the Chemex filter removes the most body-contributing oil.

The AeroPress at 84°C (-1°C from default) is calibrated for medium-light Caturra-Castillo, and the slightly lower temperature is more consequential than for darker roasts because bright fruit acidity — the primary acid in Las Rosas's dried cherry and date character — extracts efficiently at lower temperatures relative to the bitter compounds. AeroPress's pressure-assisted extraction at 84°C strikes the right balance: it pulls the bright fruit acidity sweetness and the roast-developed cocoa powder compounds together rather than sequentially. The fine grind (380μm, -20μm) is important because medium-light Caturra has lower solubility than a medium or dark roast — without that surface area increase, the 1-2 minute AeroPress window would under-extract the cocoa powder roast-developed compounds and leave a sour, bright-only cup.

The Clever Dripper's immersion-then-filter approach extracts the Las Rosas Caturra-Castillo differently than either pure immersion (French press) or pure pour-over (V60). During the steep phase, bright fruit acidity and the Strecker cocoa compounds extract evenly across all particles simultaneously — no channeling, no uneven flow. When the Clever releases, the paper filter removes the oils and fines that carry any residual bitterness from the Castillo component (whose Sarchimor parentage includes Robusta genetics that can contribute mild earthiness). The result is a cup with French press extraction evenness but Chemex-adjacent clarity. Temperature (-1°C, 93°C) and grind (-20μm, 510μm) are identical to the Kalita Wave because the Clever's release flow behavior is similar — controlled, not fast.

This bean sits at 83/100 espresso match despite being from Equator's single-origin espresso lineup — the Burundi Women of Turihamwe is the espresso-labeled bean from this roaster, while Las Rosas is the omni-roast companion. Medium-light Colombian Caturra-Castillo at 1,848m presents a specific espresso challenge: the bright fruit acidity profile that makes dried cherry and date beautiful in filter formats can taste sharply sour under espresso's rapid pressure extraction if the grind isn't fine enough to slow flow. Temperature (92°C, -1°C) backs off the default to keep those malic acids from extracting aggressively. The ratio adjustment (+0.5) runs slightly longer than the Burundi espresso to pull more of the cocoa powder Strecker compounds that are the most espresso-compatible element of this bean's flavor profile.

The moka pot concentrates this Las Rosas Colombian at roughly 1:9-1:10 ratio, which brings the cocoa powder note into its strongest expression across all brew methods. roast-developed compounds responsible for the dark chocolate character — roast-developed compounds, roast-developed compounds — are water-soluble and concentrate proportionally with TDS. At 99°C pre-boiled water, the medium-light Caturra-Castillo extracts fully through the tighter grind (330μm, -20μm from default). The sour troubleshooting score is elevated (65 — tied with espresso for highest across brewers) because the moka pot's concentrated extraction amplifies any extraction imbalance: if the grind is slightly too coarse, you get a concentrated sour rather than balanced concentrated cherry-cocoa. Using pre-boiled water in the base is non-negotiable — steam-cooking the grounds before brewing over-extracts the bitter compounds specifically.

French press at 95°C provides the elevated temperature this medium-light washed Colombian needs for adequate extraction through the coarse grind (980μm, -20μm). The unfiltered immersion method is actually a good match for Las Rosas's bright fruit acidity profile: where acids like citric can taste sharp through unfiltered methods, bright fruit acidity's rounder stone-fruit quality integrates better with the oils and fines that French press retains. The result is a cup where dried cherry and date read as full-bodied sweetness rather than bright acidity. Hoffmann's method — steep 4 minutes, then wait 5-8 additional minutes for grounds to settle — is especially relevant for this medium-light Caturra-Castillo because the extra settling time produces a clean cup while retaining the body-contributing oils that would otherwise be stripped by paper filtration.