In a large bowl, crush the Digestive biscuits into medium-sized chunks. Stir in the chopped Twix pieces.
Break the milk chocolate into pieces and add it to a pan along with the butter, golden syrup and cocoa powder. Melt gently over low heat.
Pour the melted mixture into the bowl with the crushed Digestives and Twix pieces. Mix until the biscuits are well coated then press it into your lined tin.
Melt the milk chocolate and spread it evenly over the top of the traybake. Top with chopped Twix pieces.
Refrigerate the whole thing for 2 hours until firm. Then just cut into slices and enjoy!
Video
Notes
Can be stored in an airtight container in the fridge for up to 2 weeks.