150²µ/5½´Ç³ú blueberries
2 lemons, zest and juice
1 lemon juice, juice only
275ml/9½fl oz coconut milk
250g/9oz coconut milk yoghurt
225g/8oz plain flour
1½ tsp baking powder
½ tsp bicarbonate of soda
150²µ/5½´Ç³ú caster sugar
1 tbsp caster sugar
2½ tsp icing sugar
¼ tsp fine sea salt
1 tsp vanilla extract
150ml/5fl oz vegetable oil, plus extra for greasing