- Prepare a 9 inch square baking tin by lining it with non-stick baking paper. 
- Melt together the butter and golden syrup, either in the microwave or in a bain marie. 
- Immediately add in your chopped dark and milk chocolate, stir it to help it completely melt. 
- Add your broken up gluten free shortbread, raisins, cornflakes, and crushed mini eggs. Mix so everything is dispersed and well coated. 
- Spoon the mixture into your prepared baking tin. Press it down so its even. 
- Pour the melted milk chocolate over the top and spread it out. Then drizzle the white chocolate on top and swirl it around with a skewer to make a pattern.  
- Whilst the chocolate is still wet, cover with extra chunks of the gluten free shortbread and more mini eggs. 
- Allow to set in the fridge for 2-3 hours until completely firm and the chocolate has set. Remove from the tin and use a sharp knife to cut into 16 squares.