½ tsp baking powder
30²µ/1¼´Ç³ú cocoa powder
Cocoa powder
250²µ/8¾´Ç³ú flour
Icing sugar
225g/8oz sugar
1 tsp vanilla extract
150²µ/5½´Ç³ú chocolate, minimum 70% cocoa solids, plus extra for melting (optional)
18 marshmallows
125²µ/4½´Ç³ú butter
3 free-range eggs