50g/2oz White chocolate, melted (optional)
1. Line a swiss roll tin 28cm x 18cm/11″ x 7″ with greaseproof paper.
2. Melt the butter, chocolate and golden syrup in a saucepan over a low heat.
3. Remove from the heat, then add in the crushed biscuits and Maltesers. Mix well then pour into the prepared tin, press down well and chill until set.
4. If liked, drizzle melted white chocolate over the cooled traybake.
5. Cut into bars.