½ tsp baking powder
100²µ/3½´Ç³ú caster sugar
200g/7oz caster sugar
150²µ/5½´Ç³ú caster sugar
1 tbsp cornflour
25ml/¾fl oz Italian hazelnut liqueur
125²µ/4½´Ç³ú hazelnuts, ground
2 tbsp full-fat milk or Italian hazelnut liqueur
100²µ/3½´Ç³ú hazelnuts (preferably blanched)
30g/1oz icing sugar
pinch salt
200g/7oz self-raising flour
½ tsp vanilla extract
75–125²µ/2¾–4½´Ç³ú dark chocolate, to decorate
200g/7oz butter, softened
3 free-range eggs
500ml/18fl oz double or whipping cream, well chilled
100²µ/3½´Ç³ú freshly brewed coffee