Melt ghee in a heavy-bottomed pan over medium heat.
Add whole wheat flour and roast on low flame for 10-12 minutes, stirring continuously until golden brown and aromatic.
Turn off the flame and let the mixture cool slightly for 1 minute.
Stir in grated jaggery and cardamom powder quickly until jaggery melts and combines smoothly.
Pour immediately into a greased tray, flatten with a spatula, and slice into diamonds while warm.