Combine the chia seeds and milled flaxseeds with the coconut milk. Stir well and leave for at least 15 minutes to swell up, or make the night before and leave to swell up in the fridge overnight.
Put the soaked seeds in a blender with the rest of the ingredients, and baobab powder if using, leaving the ice cubes until last. Blend until completely smooth, then add the ice cubes for extra freshness. Blend once more until completely smooth. Pour into glasses
Finish with your preferred toppings; drizzle with a little extra coconut milk, if you wish; and serve immediately.
This will keep well in the fridge for at least three days, so make a large batch at the beginning of the week.