Rinse your frozen persimmon under warm water to soften skin. Using a paring knife, peel skin off persimmon. Chop persimmon into smaller pieces, removing top and tougher core piece. Place in a blender.
Add coconut milk, cardamom, and maple syrup to blender. Cover and blend until smooth.
Pour in a glass, top with coconut whipped cream and cinnamon if desired, and enjoy!