Measure out the frozen pineapple chunks and ripe mango chunks using measuring cups, then add them to the blender.
1 cup frozen pineapple chunks, 1 cup ripe mango chunks
Pour the coconut milk into the blender over the fruit ingredients.
1/2 cup coconut milk
Secure the lid on the blender and blend on high speed for about 30-45 seconds, or until the mixture is smooth and creamy, with no visible chunks.
Stop the blender and check the consistency; if desired, add a splash more coconut milk and blend briefly until integrated.
Pour the smoothie into glasses and serve immediately, displaying a bright, thick, and vibrant mixture with a smooth surface.