Add mangoes, coconut milk and maple syrup to a blender. Blend until smooth.

Pour the mixture into a freezer-safe, air-tight container. Freeze until completely frozen. (The time it will take to freeze the mixture will depend on how wide vs tall container you use. The wider the container, the shorter the freezing time).

Once frozen, cut the frozen mixture into cubes (so it's easier to blend). Add it into a food processor and blend until all the frozen pieces are broken down (it should have a consistency of soft serve).