Take milk, condensed milk, and chocolate chips in a pan on medium-low heat.
when chocolate will start melting Add graham cracker crust and stir.
then add 2 tablespoons of sugar, chopped pistachios, and cardamom powder. mix well.
The mixture will start thickening. Continuously keep stirring. The result will be a sticky dough. Keep it aside to cool.
Grease the modak molds with a little refined oil. Place a small ball from the made mixture into the modak mould
After a while open the moulds and you are ready with your chocolate modaks that are ready to be served to Lord Ganesha.