Take milk, condensed milk and chocolate chips in a pan.
Turn the heat on medium low flame.
Chocolate will start to melt down,keep stirring continuously.
It will melt completely and becomes smooth and shiny.
Add crushed biscuits and start mixing it, and halfway through add chopped pistachio.
Mix well and it will come together,like a sticky dough.
Keep it aside till it gets cool to touch.
Grease your finger and modak mould with oil or ghee.
Start shaping the modak using the mould.
Garnish modaks with pistachio and silver vark.