Line a 20cm square cake tin with baking paper - make sure the paper goes up the sides.
Break the Cherry Ripe bars into three pieces and place them along with the Marie Biscuits into your Thermomix bowl and mix for 4 seconds on speed 6 or until the biscuits are crushed.
Add the condensed milk and mix for 10 seconds on speed 4 REVERSE.
Pour the mixture into your prepared tin and push down with the back of a spoon to flatten the surface.
Break the milk chocolate into pieces and place into a microwave safe bowl and cook for 30 second spurts until melted.
Pour the melted chocolate over the top of the slice and place in the fridge for 6 hours to set.