Line a 20cm square baking tin with baking paper and set aside.
Place the milk chocolate, condensed milk and butter into a microwave safe bowl.
Melt on 50% power in the microwave in 30 second bursts, stirring with a dry metal spoon each time.
Cook until just melted (do not over-cook) - it will take approximately 2-3 minutes.
Quickly stir through the mini marshmallows, peanuts and Turkish Delight chunks.
Pour the fudge into the prepared tin and smooth the top with a spoon.
Place into the fridge for at least 4 hours or until completely set (preferably overnight).
Slice into pieces.
Keep fudge in an airtight container in cool temperatures (room temperature is fine in cooler climates - otherwise pop it in the fridge).