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Your first steps into the world of specialty coffee
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Arabica (Coffea arabica)
Arabica accounts for 60% of global coffee production and virtually all specialty coffee. Here is what separates it from Robusta — genetics, altitude, and cup character.
Espresso
Espresso forces near-boiling water through finely ground coffee at 9 bars of pressure — producing concentrated, crema-topped shots in 25 to 30 seconds.
Ethiopia
The birthplace of Arabica and still its most genetically diverse origin — Ethiopia produces florals, berries, and citrus from thousands of heirloom varieties across its highlands.
Ethiopia — Yirgacheffe
Yirgacheffe sits within the birthplace of coffee and produces some of the most aromatic washed coffees on earth — jasmine, lemon, bergamot, and peach at altitude.
Gesha (Geisha)
Gesha is the most celebrated variety in specialty coffee — tracing its origins to Ethiopia, then Panama, where it stunned the world with jasmine florals and bergamot complexity.
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Fresh from the Atlas
The Extraction Sequence: Why Espresso Turns Sour, Sweet, Then Bitter
Coffee compounds do not dissolve all at once. Acids leave first, sugars and browning compounds next, bitter molecules last — and that order is the key to a balanced shot.
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Channeling: Why Espresso Flows Unevenly
How preferential flow paths form in a coffee puck, why they wreck extraction, and the physics of puck preparation that keeps water moving evenly at 9 bar.
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Viscosity and Body: The Rheology of Espresso
Why espresso feels thick and syrupy — the suspended solids, emulsified oils, and colloidal chemistry that give a shot its body, and the levers that change it.
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Pre-Infusion: The Physics of Wetting the Puck
What happens in the first seconds of an espresso shot — how a low-pressure wetting phase saturates the coffee bed, tames degassing, and sets up even extraction.
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Refractometry and TDS: Measuring Extraction Scientifically
How a refractometer turns a bent beam of light into a coffee-strength number, how TDS and extraction yield are calculated, and where the measurement stops being useful.
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AeroPress Complete Brewing Guide
Step-by-step AeroPress brewing guide covering the standard method, inverted method, water temperature, grind size, and recipe variables for dialling in your perfect cup.
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