Description
A rugged coffee preparation method developed for minimal equipment.
Technical
Coarse coffee grounds are boiled directly in water, leveraging heat and time for extraction. Eggshells (calcium carbonate) or cold water act as flocculants to settle grounds via charge neutralization.
Culinary Significance
Survivalist brewing that prioritizes function over finesse, producing a strong, gritty cup.
Science
Primary Reaction
Maillard reaction (pyrazines, furans)
Parameters
Temperature
96°C optimal
92°C to 100°C range
Time
3 min
2 min – 5 min
Equipment
Cast iron potHeat source (open flame)Stirring stick