1Peel the mangoes and cut the flesh away from the pit. Chop the mango flesh into small pieces.
Peel the bananas and slice them into chunks.
Add the chopped mangoes, banana slices, milk powder, sugar, and cold water into a blender.
Blend all the ingredients on high speed until the mixture is smooth and creamy.
Taste and adjust sweetness if needed by adding more sugar.
Pour the milkshake into glasses and serve immediately, chilled.