Use a powerful blender and add ice cubes. Per drink, we calculate around half a mug.
Crash the ice cubes for 30 seconds at the lowest level for the ice not melting too fast. The higher the blender level, the hotter it gets. Watch the ice cubes and switch off the mixer when they are almost completely crashed.
Now fill the flavoring liquid of your preference into the blender bowl. That can be juice, syrups, powders or gels to your taste.
Blend another 20 seconds until the preferred consistency.
Fill it into cups or glasses immediately and enjoy right away.