Stir chia and 1/2 cup of skim milk in a bowl then leave to rest 

Meanwhile, place bananas, cocoa and remaining 1 cup of milk in a blender and blend until smooth

Stir blended mixture into chia bowl. Make sure to stir well so that the chia seeds distribute throughout the mixture 

Divide into 6 small jars 

Serve with fresh fruit, or whatever takes your fancy!