Preheat the oven to 200°C (390°F) for a standard oven or 180°C (350°F) for a fan/convection oven.
Place the flour and butter into a food processor and blitz on high for 8 seconds until the mixture resembles breadcrumbs.
Pour the cold milk evenly over the flour (avoid pouring it in one spot). Blitz on high for 6 to 8 seconds until the dough starts forming into balls.
Transfer the dough to a work surface and scrape out any residual bits from the food processor.
Gently knead the dough 8-10 times to bring it together into a smooth ball. Pat it down into a 2 cm (4/5") thick disc. If necessary, dust with extra flour.
Optionally, lightly roll across the top with a rolling pin to smooth it out.
Dip a 5 cm (2") round cutter into extra flour and press it straight down into the dough (do not twist). Repeat across the entire disc.
Remove the excess dough around the scones, then carefully transfer the scones onto a baking tray, ensuring not to smear or press the cut edges.
Gather the dough scraps and repeat the process. You should get about 10 scones in total.
Brush the tops lightly with milk (optional).
Bake for 10-12 minutes or until the tops are golden and the scones sound hollow when tapped.
Remove the scones from the oven, transfer them to a dish towel, and wrap loosely (this keeps the tops soft).
Allow to cool for about 10-15 minutes, then serve warm. Traditionally, scones are split with hands (no knife!), spread with jam, and topped with cream.