2. In a pan heat the butter, chocolate, golden syrup, caster sugar and cocoa powder, stirring until melted together. Once melted leave to cool for ten minutes.
3. Break about a quarter of the biscuits into pieces and then crush the rest.
4. In a large bowl, place the maltesers, mixed chocolate chips, mini marshmellows, and biscuits and stir together with the melted chocolate sauce. Pour into the prepared cake tin and leave to set in the fridge for 2 hours minimum.
5. When it’s set, cut into snack sized squares and enjoy!! Will quickly be eaten at a party =]