1. To prepare
Combine 1/3 each of the marshmallows, peanuts, cherries and set aside.
2. To combine
Melt together the milk and dark chocolate buttons in a glass bowl over simmering water, make sure the bowl doesn’t touch the water. Stir in the biscuits and remaining marshmallows, peanuts and cherries into the melted chocolate.
3. To set
Spoon mixture into a lined 18cmx30cm slice pan. Gently press the reserved marshmallow mix into the top of the slice. Chill until firm and then slice into squares to serve.