Peel the cucumber – cut into half lengthways and scoop out the seeds and discard – chop the flesh into small chunks.
Cut the kiwi fruit into halves. Scoop out the flesh with a teaspoon and discard the skins.
Chop the celery into small chunks.
Place fruit, celery, spinach, apple juice, green powder and mint into a blender.
Add ice cubes and blend until smooth.