1: Soak chia seeds for 15–20 minutes until they form a gel.
2: Add mangoes, coconut milk, soaked chia seeds, honey, and cashews to a blender.
3: Blend everything together until completely smooth and creamy.
4: Add ice cubes into the glass, pour in the thick shake, garnish with mango chunks, nuts, and tutti frutti (optional), and enjoy chilled.