Melt the chocolate, butter and golden syrup together over low heat in a saucepan. Leave to cool for around 10 minutes.
Crush the digestive biscuits into medium-sized chunks then add them to a large bowl along with the mini marshmallows and the Bounty bar pieces. Mix well.
Pour the melted chocolate mixture into the bowl and mix until everything is evenly coated. Transfer the mixture to your lined tin and press it down firmly into place.
Refrigerate for 3 hours. Remove from the tin, cut into squares and enjoy!
Video
Notes
Store in an airtight container in the fridge for up to 2 weeks.