Line a square or rectangular tin with butter paper. Keep aside.
Roast and chop cashew and keep aside.
Break cookies into small pieces
Combine condensed milk and butter in a microwave proof bowl.
Microwave it for 1 minutes and stir to mix butter and condensed milk.
Add chopped chocolate to the mixture and mix it well till the whole chocolates melts and forms a smooth mixture. Microwave for 15-30 sec, if need be.
Add cashew and unibic cookies. Stir to combine well.
Tip into prepared tin and spread the mixture uniformly. Chill for 2 hours.
Take out of the tin, when set, peel off the butter paper and cut into squares.
Enjoy the deliciousness of unibic chocolate cashew fudge.