Phase IV · Grinding, Water, and Extraction

Chapter 19
Why We Grind Coffee
How does surface area relate to extraction?
Chapter 20
Grind Size
What does "grind finer" actually change?
MVP
Chapter 21
Coffee and Water
Why does the same bag taste different with different water?
MVP
Chapter 22
Brew Ratio
How do coffee dose and water decide how strong a cup is?
MVP
Chapter 23
Extraction
What does water take from coffee, and how much is right?
MVP
Chapter 24
The Five Major Brewing Variables
Grind, ratio, temperature, time, agitation — which do you check first when a cup goes wrong?
MVP

Phase project · Fix the Cup

Given simulated sour, weak, bitter, hollow and astringent cups, decide which variable to investigate first.