Grate the Mawa or Khoya and keep it aside on a plate.
Crush 8-10 Parle G biscuits in a food processor and keep it aside.
Grease a non-stick pan with little ghee and add grated Mawa, condensed milk and cardamom powder in it.
Keep it on a medium flame and keep stirring constantly for 3-4 minutes till Mawa melts and it forms like a liquid consistency.
Mix and continue to cook for another 4-5 minutes until the mixture thickens.
Keep stirring constantly or else it will stick to the pan and burn.
Switch off the flame when the mixture thickens and forms like a dough.
Remove it on a plate and let it cool.
Once it cools down a bit add crushed Parle G biscuits in it and mix it well.
Let the whole mixture cool for a minute.
Grease the modak mould with ghee and start moulding it.
Make all the modaks in a similar way and place it on a plate.
Serve it immediately or you can refrigerate it for 2-3 days.
These modaks will not last for more than 2-3 days so be sure to consume it before that.