3: Tip this into a mixer bowl and add 125 g flour, 125 g butter, 1 egg, the grated 80 g Parmesan (Parmigiano Reggiano) and ½ teaspoon salt.
4: Knead together until the dough is evenly mixed.
5: Transfer the dough onto a sheet of baking paper and shape into a flattened square or rectangle.
6: Lay a second sheet of baking paper on top and roll out with a rolling pin. Try to keep the rectangular shape as far as possible to minimise offcuts (stage 8). Refrigerate for at least 1 hour.
7: Preheat the oven to 360°F (180°C) If necessary, finish rolling out the dough (still with the paper on), then remove the top paper.
8: Cut out small biscuits with a cutter in your preferred shape. Here they are simple rectangles.
9: Transfer the biscuits as you cut them onto the baking sheet you lined with paper in stage 7.