Essence. Extraction of the quintessence from potent beans. A 30-second affair. A robust art form. (Observation: Grinder calibration required).
Consider milk. (Froth dynamics): An emulsion, turbulence demonstrated. Coffee swims in milk clouds. Symbiotic relationship apparent. Precision in ratios.
Layered harmonies. Espresso x Milk x Foam balance the trinity. Sequence: Espresso – Milk Carpet – Foam Mountain. (Foam anomaly: Depth perception limited).