Line a 9" square tin with parchment paper and leave to the side.
In a large bowl, add in the chocolate, golden syrup, unsalted butter and melt on a low heat over a double boiler, or in the microwave on short bursts until fully melted then stir until smooth!
Once its melted and combined, add in the mini marshmallows, chopped digestive biscuits, and chopped Crunchie bars and fold together evenly.
Pour your mixture into the tin and spread until it’s even.
Refrigerate for at least 2 hours until set, chop up, and enjoy!
Notes
I really would recommend using just milk or dark chocolate for this as it melts better than white chocolate, and the white chocolate might mix/split when mixing it with the golden syrup or butter!
If you did want to use dark chocolate instead of milk, just straight swap the chocolate quantity wise!
You can easily half the recipe for less, but these are so moreish you will want the large piece! Trust me!