Mix cocoa and cornflour in ½ cup milk.
Boil the remaining milk with sugar.
Add dissolved cocoa & cornflour to the milk stirring it continuously.
Cook on low heat for 3-4 minutes and keep aside.
Beat the thickened fruity and add cream and yellow colour
Freeze till partially set.
Beat once again and freeze till firm.
Keep in the fridge till serving time.
15 minutes before serving, return to the freezer to chill it properly