Add two or 3 tbsp of milk into a small bowl.
Add the custard powder to it and mix well to a lump free mix.
Set it aside till needed.
Bring the rest of the mix to a boil.
Add the sugar and stream in the custard slurry.
Stir constantly, and let the custard cook and thicken.
Stir in the instant thandai masala at this stage
Once cooked remove from heat and set it aside to cool.
Mix occasionally to avoid the film like layer forming on top.
Clean, peel and chop the fruit.
Add them to the mixing bowl.
Add the dry fruits if using any.
Ladle in the cooled custard and give it a good mix.
Sprinkle the instant thandai masala and mix again.
Ladle in the rest of the custard and mix till they are a scoopable mix.
Ladle into cups and chill
Serve after an hour or two of chilling.