Add the banana and pineapple chunks to the blender. Then pour in the coconut milk and vanilla. Blend until smooth and creamy.
Pour into glasses and garnish with a slice of fresh pineapple. Serve immediately or pour into an airtight container and refrigerate for up to 1 - 2 days.
Notes
If you are wanting an alcoholic beverage, you can also add a shot of rum with the other liquids.