1 large punnet blackberries (about 200g/7oz or 36 small blackberries from the hedgerow)
250g/9oz plain flour
30g/1oz plain flour
1陆 tsp almond extract
2 tbsp caster sugar
100驳/3陆辞锄 caster sugar
handful flaked almonds, to decorate
100驳/3陆辞锄 ground almonds
5 tbsp icing sugar, plus extra for dusting
1陆 tsp vanilla extract
250g/9oz frozen butter, grated
100驳/3陆辞锄 butter, softened
1 large egg