4–5 tbsp raspberry or strawberry jam
325²µ/11½´Ç³ú plain flour
2 tsp baking powder
½ tsp bicarbonate of soda
200g/7oz caster sugar
300²µ/10½´Ç³ú icing sugar, sifted, plus extra for dusting.
1 tsp vanilla extract
½ tsp cider vinegar
100ml/3½fl oz soya milk
200g/7oz dairy-free margarine
150g/5½oz dairy-free margarine
100g/3½oz dairy-free yoghurt