Fill an ice tray or freezer-safe container with water
Freeze until solid
Remove the ice from the tray or container
Place the ice cubes in a clean kitchen towel, cloth bag, or sturdy zip-top bag
Wrap or seal the ice securely
Crush the ice with a rolling pin, mallet, or heavy spoon
Use a blender or food processor for finer crushed ice, if needed
Pulse briefly to avoid turning it into slush
Use immediately or keep in the freezer until needed