Pour the chilled cola soda into a large mixing bowl or a blender jar.
Add the crushed ice to the cola, then briefly pulse the blender or stir vigorously to combine. Aim for a slushy consistency, with ice evenly dispersed and starting to freeze slightly around the edges.
If using a blender, pulse in short bursts until the mixture is uniformly slushy and icy. If stirring by hand, use a spoon to break up any large ice chunks, ensuring the mixture is cold and slightly frosty.
Once the mixture reaches a granular, semi-frozen texture, transfer it into a tall glass or serving cup. You want the texture to be thick but spoonable, with ice crystals visible throughout.
If desired, add a drizzle of syrup or a small sprinkle of sugar to enhance sweetness. Gently stir to combine just before serving.
Serve immediately with a straw or spoon, enjoying the icy, fizzy sensation that’s perfect for hot days or nostalgic cravings.
