1. Place coconut milk and ube condensed milk in a blender.
2. Blend until smooth to create the ice cream base.
3. Transfer the mixture to an airtight container and freeze for a couple of hours for a simple ice cream.
4. For a creamier texture, churn the mixture in an ice cream maker.
5. Optional: Add toasted macadamias, ube extract, and halaya for additional flavors.
6. Serve as-is or stuff in a warm pan de sal bun for an ice cream sandwich.