Roast 250 grams of peanuts on a medium flame until they turn golden brown. Allow them to cool, and then remove the skins.
Crush the roasted peanuts coarsely and keep them aside.
Grease a flat tray or plate with ghee and set it aside.
In a heavy-bottomed pan, add 150 grams of jaggery and 1/4 cup of water. Heat it on a low flame until the jaggery melts completely.
Increase the flame to medium and continue cooking until the syrup reaches a hard ball consistency. To test, drop a small amount of syrup into a bowl of cold water; it should form a hard ball.
Add the crushed peanuts to the jaggery syrup and mix well, ensuring the peanuts are evenly coated.
Quickly pour the mixture onto the greased tray and spread it evenly with a greased rolling pin.
While still warm, cut the chikki into desired shapes using a greased knife.
Allow the chikki to cool completely before separating the pieces.
Store the peanut chikki in an airtight container.