3 tbsp caster sugar, plus 1 tbsp for sprinkling
1 tsp mixed spice
185驳/6陆辞锄 self-raising flour
50驳/1戮辞锄 sultanas or currants (optional)
1 tbsp butter, melted, plus extra for serving
1 large free-range egg
185ml/6陆fl oz semi-skimmed milk