01 -
Pour 340 ml of Diet Coke into an ice cube tray and freeze until solid, approximately 2 hours.
02 -
In a blender, combine the frozen cola cubes, frozen dark sweet cherries, whiskey, and chilled Diet Coke. Blend on high until the mixture is smooth and slushy.
03 -
Pour the slushie into glasses and garnish each with a maraschino cherry if desired. Serve immediately, or transfer to a freezer-safe container for later use.