100²µ/3½´Ç³ú plain flour
½ tsp almond extract
1 heaped tsp baking powder
100²µ/3½´Ç³ú caster sugar
150²µ/5½´Ç³ú ground almonds
150²µ/5½´Ç³ú icing sugar
½ tsp salt
1 tsp vanilla extract
200g/7oz dark chocolate (70% cocoa solids)
50g/1¾oz unsalted butter, softened
2 free-range eggs