Description
Rapid cooling of freshly brewed coffee preserves volatile aromatic compounds that would otherwise evaporate during gradual cooling.
Technical
The flash-chilling process rapidly lowers coffee temperature from ~92°C to below 10°C in seconds, slowing molecular diffusion and preventing oxidation of delicate compounds like 3-mercapto-3-methylbutyl formate (coffee's 'catty' aroma). This preserves fruity esters and prevents thermal degradation of chlorogenic acid lactones.
Culinary Significance
Creates iced coffee with brighter acidity and more pronounced floral/fruit notes compared to cold brewing or slow-chilled methods, while avoiding the dilution of traditional iced coffee preparations.
Science
Primary Reaction
Supercooling of aqueous solution
Parameters
Temperature
92°C optimal
85°C to 96°C range
Time
2:15 (brew time)
2:00 (brew time) – 2:30 (brew time)
Equipment