Boil 1 Ltr Milk in a thick bottomed pan preferably non stick.
When it starts to boil, completely simmer to the lowest flame possible
Keep stirring every 5 minutes to mix the cream that forms on the top layer.
When it reduces to less than 1/2 in volume, Add a little bit of corn flour. Adding corn flour is optional. Since Skimmed milk is used, I have added corn flour to thicken.
It reduces and thickens at last. Keep stirring until all the liquid in it evaporates and it gets to a thick ball like consistency and leaves the sides of pan.
Put off, cool down and store it in air tight container and refrigerate until next use.