Da Matteo

Classic Espresso - our full bodied espresso

ethiopia medium roast natural bourbon
sometimes a blend

Blending for espresso is a different exercise than single-origin selection. The 80/20 split here — Brazil as the anchor, Ethiopia as the lift — is a structurally sound approach that uses each origin's extraction chemistry for a specific purpose. Brazil Cerrado brings what it always brings: Mundo Novo and Bourbon varieties grown at lower altitude with natural processing, producing a dense, nutty, low-acidity base with heavy melanoidin content. Melanoidins — which make up 10–18% of roasted coffee dry weight — are responsible for body, mouthfeel, and the viscous texture that espresso demands. The Brazil component builds that foundation. At medium roast, Maillard browning products including Strecker degradation compounds from valine and leucine (methylpropanal, 3-methylbutanal) contribute chocolate and malt character. The 20% Ethiopian Guji/Uraga fraction does the opposite job: it introduces citric acid and the volatile ester load that Ethiopian naturals carry, adding a fruity brightness that the Brazil component can't provide at any roast level. The Ethiopia component is the contrast — the acid and aromatics that prevent the cup from reading flat. In espresso, where extraction happens under pressure over 25–30 seconds, these fruit volatiles extract quickly in the fast phase and give the shot its top-end character. Medium roast on both components is an extractability compromise. Light-roasted beans are less soluble and harder to extract under espresso conditions; darker roasts lower the soluble ceiling and produce bitter dry-distillate compounds that show up harshly at espresso concentration. Medium development sits in the sweet spot where both components extract predictably and the Maillard-driven sweetness holds without tipping into bitterness.
Chemex 6-Cup 89/100
Grind: 565μm Temp: 90°C Ratio: 1:15.0-1:17.0 Time: 3:30-4:30

The 90°C brew temperature — 4 degrees below the standard default — reflects two simultaneous adjustments: medium roast drops 2°C because roasting has already broken down a portion of the acidity and rendered the bean more soluble, and the natural processing drops another 2°C to protect the aromatics from processing that survived roasting. The Chemex's 20-30% thicker paper filter then strips the natural-process oils that would otherwise muddy the cup, and that oil removal is especially valuable for a blend with a chocolate-malt backbone — those roast-developed body compounds would create a heavy, opaque texture if the processing oils passed through alongside them. What you get instead is a clean chocolate-malt architecture with the fruity brightness readable on top as distinct top-note clarity. The slightly wider 565μm grind (15μm above default) accounts for the medium roast's increased solubility and the oil load natural processing adds to particle surfaces.

Troubleshooting
sour: Grind finer by ~22μm and raise temp by 1°C. The Ethiopian natural fraction is dominated by fruity acids at early extraction — you haven't yet dissolved the Maillard sweetness from the Brazil component. Finer grind exposes more surface area to accelerate extraction through that sour-first phase.
thin: Increase dose by 1g or reduce water by 15g. The Chemex filter removes the natural-process oils that would otherwise contribute body, so TDS has to do the work. If a metal filter is available, swapping it will reintroduce the melanoidin-rich body the paper strips.
Hario V60-02 88/100
Grind: 515μm Temp: 90°C Ratio: 1:15.0-1:17.0 Time: 2:30-3:30

The V60's single-spiral rib structure produces faster drawdown than the Chemex, which is an asset with a medium-roast natural blend: the Brazil component's high roast-developed body compounds content can create a dense brew bed, and slower flow risks over-extraction of the bitter compounds that medium roast has begun to develop. Temperature at 90°C matches the Chemex for the same reasons — natural Ethiopian processing calls for 2°C off and medium roast calls for 2°C off, landing at a brew temperature that preserves the fruit aromatics without underdeveloping the roast-developed compounds from the Brazil anchor. The V60 paper filter strips the natural-process oils just as the Chemex does, but the faster flow means the cup reads slightly brighter and less rounded than Chemex. At 515μm grind, you're 15μm coarser than default to compensate for increased particle surface created by natural-process oils.

Troubleshooting
sour: Grind finer by ~22μm and raise temp by 1°C. The Ethiopian natural acids extract first — you're pulling citric and fermentation-derived organic acids before the Brazil Maillard sweetness comes through. Finer grind or higher temp pushes extraction further along the compound sequence.
flat: Grind finer by ~22μm and raise temp by 2°C. If beans are fresh, the issue is underextraction of the Maillard compounds from the Brazil base — you're not reaching the chocolate and caramel register. Also check water mineral content; very soft water can't extract efficiently regardless of grind.
Kalita Wave 185 87/100
Grind: 545μm Temp: 90°C Ratio: 1:16.0-1:18.0 Time: 3:00-4:00

The Kalita Wave's flat-bottom geometry creates an even extraction bed where water dwells more uniformly than in a V60's conical — a useful property for a blend where the Brazil and Ethiopian components may have slightly different particle densities and thus different extraction rates. The wave filter's corrugated walls maintain an air gap to reduce uneven heat loss. At 90°C and 545μm, the parameters mirror the other paper pourover methods: the 4°C temperature reduction protects natural-process fruit aromatics while the slightly coarser grind (15μm above default) accounts for the natural processing's effect on particle surface. The Kalita's balanced, sweetness-forward character is well-matched to the Brazil anchor of this blend — its flat bottom means the finer Ethiopia component and coarser Brazil component dwell together rather than stratifying toward a cone tip, improving evenness across the two-origin extraction.

Troubleshooting
sour: Grind finer by ~22μm and raise temp by 1°C. The sourness signals you're extracting primarily the fast-phase Ethiopian fruit acids without reaching the Brazil component's chocolate-malt Maillard compounds. Finer grind increases surface area contact to push the extraction deeper into the compound sequence.
flat: Grind finer by ~22μm and raise temp by 2°C. A flat cup on this blend usually means the Brazil Maillard base isn't fully extracting — the nutty, chocolatey register is missing. Don't pour on the filter walls, which can collapse the wave and create channeling.
AeroPress 87/100
Grind: 415μm Temp: 81°C Ratio: 1:12.0-1:14.0 Time: 1:00-2:00

The AeroPress operates at 81°C here — well below the pourover methods — and the reasoning is specific to this blend's natural Ethiopian fraction. AeroPress already runs at lower temperatures than other methods by standard practice, and combined with the 4°C natural-processing reduction and medium-roast reduction, the system lands at a brew temp that strongly protects fruit aromatics from the Ethiopian component while still extracting through the roast-developed-sweet zone from the Brazil fraction. The compressed immersion environment with paper filter produces a cup with concentrated fruit clarity — the Ethiopia's bright acidity and aromatics from processing are preserved intact, while paper catches the natural-process oils. At 415μm (15μm above default), grind is fine enough for the short 1-2 minute contact time to extract fully. If the shot tastes strong, this is expected: AeroPress ratio is 1:12-1:14, meaning higher TDS than pourover by design.

Troubleshooting
strong: Reduce dose by 1g or add 15g more water. At 1:12-1:14 ratio, AeroPress brews at higher TDS by design, but this blend's Brazil melanoidin content can push body further than expected. Diluting with hot water after pressing maintains temperature while dropping concentration.
bitter: Grind coarser by ~22μm and drop temp by 1°C. The medium-roast Brazil component has developed pyrolysis compounds that extract in the slow phase — if you're getting bitterness at the short AeroPress contact time, grind coarseness is the first lever. Coarser grind reduces surface area and slows extraction rate.
Clever Dripper 87/100
Grind: 545μm Temp: 90°C Ratio: 1:15.0-1:17.0 Time: 3:00-4:00

The Clever Dripper combines immersion steeping with paper-filter drawdown — a hybrid that's particularly interesting for this espresso blend because the immersion phase lets the Brazil component's dense melanoidin structure extract thoroughly before the paper filter strips oils during drainage. Temperature at 90°C follows the same natural-plus-medium logic as the other paper methods. The Clever's extended contact time compared to a V60 pours more body from the Brazil base while the paper filter prevents the natural-process oils from the Ethiopian component from muddying the cup. The 545μm grind is medium — coarser than V60 — which works well here because the steep time compensates for reduced surface area. This is a lower-skill-ceiling method than V60 for this blend: the immersion phase removes the timing sensitivity of continuous-pour technique.

Troubleshooting
strong: Decrease dose by 1g or increase water by 15g. The Clever's immersion phase extracts more thoroughly than a pourover, and combined with the Brazil component's dense soluble content, TDS can run high. Adjust ratio before touching grind — it's the most direct lever.
bitter: Grind coarser by ~22μm and drop temp by 1°C. In the Clever's immersion phase, over-steeping the medium-roast Brazil fraction brings out pyrolysis compounds — the bitter dry distillates that extract in the slow phase. Coarser grind shortens effective extraction contact even at the same steep time.
Espresso 77/100
Grind: 265μm Temp: 89°C Ratio: 1:1.0-1:3.0 Time: 0:25-0:30

This medium-roast natural Ethiopian Bourbon scores 77/100 for espresso, reflecting a genuine tension: natural processing's fermentation character becomes less predictable under 9-bar pressure extraction. Espresso concentrates everything, and fruit aromatics from processing can read as funky rather than fruity when compressed into a 38g shot. Temperature at 89°C (4°C below default) is reduced to control both roast- and processing-related extraction intensity. The 265μm grind (15μm above default) counteracts the tendency of natural-process particles to restrict flow due to surface oils from processing. At 1:2 ratio, the roast-developed body compounds base from medium roasting produces viscous, crema-supporting body, while the natural processing provides aromatic lift. Expect the shot to need slightly longer extraction than a washed equivalent given the processing style.

Troubleshooting
sour: Grind finer by ~10μm and raise temp by 1°C. The Ethiopian natural fraction's citric and fermentation acids extract rapidly under pressure — sourness means you haven't yet extracted the Maillard sweetness from the Brazil component. Smaller grind adjustments matter more at espresso fineness.
strong: Decrease dose by 1g or increase yield by adding more water to extend to a longer ratio. At espresso concentration, the Brazil melanoidin density makes this blend run rich. The 1:2 ratio is a starting point — moving toward 1:2.5 or 1:3 will drop TDS while maintaining extraction yield.
Moka Pot 68/100
Grind: 365μm Temp: 96°C Ratio: 1:9.0-1:11.0 Time: 4:00-5:00

The moka pot's ~1.5-bar pressure is lower than espresso but higher than gravity pourover — a middle zone where natural-process oils pass freely through the metal basket without paper filtration. For this blend, that creates a specific trade-off: the Brazil roast-developed body compounds base gains additional body from the unfiltered oils, but the Ethiopian natural's delicate fruit aromatics get masked rather than highlighted when co-extracted oil compounds compete for aromatic attention. Temperature at 96°C (still below boiling — use pre-boiled water in the base) matches the parameter reduction logic but arrives there differently, since moka heat is controlled by removing the pot when sputtering starts. At 365μm and 1:9-1:11 ratio, the brew is more concentrated than filter methods, which makes the oil-fruit tension more pronounced. This is a lower-match brewer for the Ethiopian character; the Brazil chocolate-nutty base reads clearly.

Troubleshooting
strong: Decrease dose by 1g or increase water by 15g. Moka ratio already brews concentrated by design; at 1:9-1:11, the Brazil component's high melanoidin content can push TDS further. Remove from heat the moment sputtering begins to avoid additional over-extraction.
sour: Grind finer by ~22μm and raise temp by 1°C. At lower pressure than espresso, the moka pot extracts less thoroughly per pass — the Ethiopian natural acids dominate early extraction. Finer grind increases surface area to push past the sour-first phase into Maillard sweetness.
French Press 66/100
Grind: 1015μm Temp: 92°C Ratio: 1:14.0-1:16.0 Time: 4:00-8:00

French press runs hotter (92°C) than the paper-filter methods despite the same natural-plus-medium roast profile — the higher temperature compensates for the metal filter's inability to control extraction chemistry the way paper does. Without paper filtration, the natural-process oils from the Ethiopian component pass freely into the cup, adding body but muddying the bright citric-acid clarity that the Ethiopian fraction is supposed to contribute. The Brazil component gains body from those unfiltered oils, which reinforces its chocolate-malt Maillard character. The coarse 1015μm grind and 4-8 minute steep gives the Brazil component time to extract its full melanoidin body. Hoffmann's extended rest after pressing (5-8 minutes additional) helps settle fines that would add unwanted bitterness from the medium-roast bitter compounds zone.

Troubleshooting
strong: Decrease dose by 1g or add 15g more water. French press extracts without time pressure — the Brazil melanoidin density continues extracting throughout the steep, making TDS run high. Adjusting ratio before changing grind is more reliable with immersion methods.
bitter: Grind coarser by ~22μm and drop temp by 1°C. The medium-roast Brazil component's pyrolysis compounds accumulate with steep time. Try Hoffmann's method: steep 4 minutes, then wait an additional 5-8 minutes after pressing to let fines settle before pouring.
Cold Brew 64/100
Grind: 915μm Temp: 0°C Ratio: 1:6.0-1:8.0 Time: 720:00-1080:00

Cold brew scores lowest (64/100) for this blend — the lower score reflects a combination of medium roast's accessibility and the natural Ethiopian fraction's delicate aromatics extracting poorly in cold water. The roast-developed body compounds that the Brazil base provides extract less completely in cold water, meaning the blend's core body comes through diminished. Cold water also means less bitterness develops, but the chocolate and caramel character also fails to fully emerge. The natural Ethiopian fraction's fruit aromatics are temperature-dependent — cold water extracts fewer of these aromatic compounds than hot brewing does. What cold brew preserves is the fruit acidity from the Ethiopian component, making the concentrate read more one-dimensionally fruity than the blend's intended layered chocolate-fruit profile.

Troubleshooting
flat: Grind finer by ~22μm. Cold brew's low temperature means the Brazil Maillard compounds extract slowly — a finer grind increases surface area to compensate. If still flat after adjusting grind, the beans may be degassed; a medium roast's CO2 dissipates faster than light roast, limiting cold extraction potential.
strong: Decrease dose by 1g or increase water by 15g. Cold brew at 1:6-1:8 is a concentrate by design; if the Brazilian melanoidin fraction is extracting well, TDS can run high. Dilute to taste after brewing rather than reducing dose, which affects final flavor balance.