Crush Marie biscuits in a ziplock bag or in a food processor.

Crush Walnuts in a ziplock bag/plastic bag or food processor.

Chop both types of chocolates.

Now melt the chocolate in microwave by placing it in glass bowl and microwave on high for one minute. Otherwise heat a pot of water and place the glass bowl with chocolate in that and stir it till chocolate melts.

To the melted chocolate add crushed biscuits, walnuts (save a handful for topping), condensed milk, cocoa powder and mix everything well.

Line up a square/rectangle dish or baking tin with parchment paper and pour the chocolate fudge mixture,

Level the mixture with a spatula and sprinkle some crushed walnuts and a pinch of sea salt.

Refrigerate it for 30 minutes, cut it into desired shape and enjoy the goodness of chocolate and walnuts in this delicious chocolate walnut fudge.