Unroll puff-pastry onto a sheet of baking paper and cut it into two 21x21 cm (8x8'') squares.
Using a fork, prick the puff pastry all over so that it doesn't puff up too much while baking.
Cover the squares with another layer of baking paper.
Lay a baking tray on top and bake for 12 minutes until golden and crispy. In case the pastry is still slightly pale bake it for another 2-3 minutes.