300ml/10fl oz buttermilk (or whole milk mixed with 3 tbsp lemon juice)
12 chocolate-covered caramels
350g/12oz plain flour, plus extra for dusting
½ tsp bicarbonate of soda
25g/1oz caster sugar
1 tsp cocoa powder, for dusting
½ tsp salt
1 tbsp vanilla bean paste
100²µ/3½´Ç³ú dark chocolate, roughly chopped (or chocolate chips)
75²µ/2½´Ç³ú dark chocolate, melted