Stir together water, brown sugar, dried hibiscus, ginger, cinnamon stick, and cloves to a small saucepan over medium heat.
Bring mixture to a boil, then turn off heat and allow syrup to cool before straining out the solid ingredients.
Add hibiscus syrup, coconut milk, sweetened condensed milk, evaporated milk, vanilla extract, and salt to food processor or blender and process on high until well combined and slightly thickened (about 5-7 minutes).
Transfer liquid to freezer-safe container and freeze for at least four hours.
Notes
PreparationThe syrup color and flavor deepens as it steeps so don't rush the cooling process if you want vibrant purple ice cream with deep flavor!If you're concerned about frost forming on the surface of the ice cream while freezing, cover with plastic wrap, pressing it into the surface of the liquid.ServingOnce froze, this ice cream comes out ready to scoop with no wait time.StorageThis ice cream keeps in the freezer for up to six months, thought the texture can start to change and become more icy after about one month.