Boil the Seeds: Place 1 ½ cups of cempedak seeds in a pot of water and boil for 40 minutes. This softens the seeds, making them blendable.
Prepare the Seeds: Once boiled, remove the hard shell from the seeds. The brown skin can remain, it is tricky to remove and not necessary.
Blend the Ingredients: In a food processor or blender, combine the boiled seeds, maple syrup, vanilla extract, and coconut cream. Blend until smooth, stopping to scrape down the sides as needed.
Adjust Consistency: If you prefer a sweeter icing, add more maple syrup. Be cautious with additional coconut cream to avoid a runny icing.