Roll out the chilled pastry dough to form a rectangle twice the size of the flattened butter square. Fold the pastry over the butter, then turn it 90 degrees and roll it out until it has doubled ...

about 75g/3oz light muscovado sugar about 9 ripe large plums, halved and stones removed 100g/3½oz marzipan 1 x 320g/11½oz pack all-butter puff pastry ice cream, cream or crème fraîche, to ...