Place the butter and sliced Snickers bars into a saucepan and melt over a gentle heat.
Crush the digestive biscuits/Graham Crackers and cornflakes. Then add the peanuts and crush a little more. I used my food processor for this, but if you want to hit things with a rolling pin in a freezer bag to work out some aggression, then go ahead!
Add the snickers and butter mix to the dry ingredients and mix well.
Press into the lined tin and top with melted chocolate.