Description
A coffee cocktail where unmixed rum creates a thermodynamic gradient beneath whipped cream insulation.
Technical
The drink relies on density stratification (ρ_whipped cream = 0.5 g/cm³ vs ρ_rum = 0.79 g/cm³) and thermal convection inhibition. Ethanol (40-54% in rum) forms hydrogen bonds with coffee compounds like chlorogenic acids.
Culinary Significance
Served unmixed as a social challenge, with consumption requiring careful sipping to avoid the rum layer until intended.
Science
Primary Reaction
Ethanol-polyphenol complexation
Parameters
Temperature
80°C optimal
0°C to 90°C range
Temperature of the coffee and rum mixture
Time
3 minutes
2 minutes – 5 minutes
Equipment
Coffee makerWhipped cream dispenserRum bottle