The spinach is really to provide that natural green colour and you can omit and substitute 3 tablespoons milk of choice.
Frozen spinach can be used, but you must have a high powered blender to achieve a smooth non-leafy texture. The colour isn’t as vibrant either.
There is a huge difference between coconut cream and coconut milk. If you only have canned coconut milk, you might have to use 2 cans since you’ll only use the solid cream formed at the top.
Chilling the coconut cream overnight before will decrease freezing time