Line a 28cm x 18cm slice tray with baking paper making sure you leave paper hanging over the sides to help remove the slice from the tin once set.
Crush the biscuits into small pieces - you can use a food processor, or just bash them with the end of a rolling pin!
Break the Caramello Chocolate into squares and place it into a microwave bowl along with the butter (which has been cubed) and cook until melted - I cook for 30 second spurts and mix together in between.
In a large bowl add the melted butter & chocolate, condensed milk and crushed biscuits. Mix together to combine and then pour into the prepared tray.
Using a metal spoon, spread slice evenly over the tray and push down to smooth.
Break the milk chocolate into pieces and place it into a microwave safe bowl and cook for 30 second spurts until it has melted.
Pour the melted milk chocolate over the top of the Caramello Slice and place in the fridge for 2 hours or until set.
Remove the set slice from the baking tray and cut into small pieces (or large - no judgement here!) and enjoy.