Secondly, break the chocolate into small pieces. Then put it into a non- stick saucepan with the condensed milk, but do not put it on the heat yet.
After that crush the biscuits into small pieces or a powder (make it to your own liking). Now crush the peanuts and M&M's® into small pieces.
Then melt the chocolate and condensed milk mixture on a low heat, make sure to stir it continuously with a wooden spatula.
Once the chocolate has completely melted take it off the heat and add in the biscuits, peanuts and M&M's®. Fold it into the mixture until it becomes completely combined (tip: if the mixture starts to becomes stiff quickly add a tablespoon of milk to soften it up.)
Then put the chocolate mixture into the lined tin and place it into the fridge to set. Leave it in the fridge for up to 2 hours or best overnight.
Finally, chop it up into bite sized pieces and plate it. After that enjoy your yummy chocolatey, rocky fudge treat.