Overview
How brewing controls the cup: what can still be changed once water hits grounds, the model that formalizes it, and the method that turns it into practice. The through-line: brewing controls far less than it appears to, and the good frameworks embrace that.
Core Concepts
- Most Cup Character Is Fixed Before Brewing — the framing claim: bean, roast, and grind decide most sensory dimensions; brewing moves only two
- Coffee Brewing Control Chart — the two axes themselves: strength (TDS) and extraction yield, with the Golden Cup target and its modern caveats
- Coffee Compounds Extract in Order — the mechanism underneath: acids, then sugars, then bitters, which is why extraction yield tastes like something
- 4-6 Brewing Method — the practice: Kasuya’s pour-over framework putting one knob on each axis
Origin
Sparked by a barista conversation (2024-09-05 Coffee at ModCup) and unpacked in 2026-07-26 Coffee Brewing Notes Restructure.
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