Try this Spiced Iced Coffee Chiller recipe, or contribute your own.
How solid do coffee ice cubes need to be before they can support a cold beverage without instantly shattering or melting into slush? Freezing water molecules expand into an interlocking crystalline lattice, which requires a minimum of four hours at 0 degrees Fahrenheit to achieve complete structural rigidity. Pouring warm liquid over partially frozen cubes accelerates thermal transfer, causing surface ice to liquefy instantly and dilute the surrounding solution.
Aromatic compounds such as benzaldehyde in almond extract bind preferentially to milk fats rather than water molecules, creating a smoother delivery on the palate. Proper chilling ensures the beverage maintains its intended viscosity from the first pour to the final sip.