I haven't work in my kitchen for a while, I made this long time ago and here I'm sharing it to everyone.
1 1/2 cup self-rising flour (+ extra for dusting)
1 tablespoon powder sugar
pinch of salt
1/3 cup butter, cut into small pieces
1 egg lightly beaten
1/4 cup buttermilk
Preheat the oven to 200°C (400°F). Place a parchment paper in a baking sheet. Sift the flour, sugar, and salt in a mixing bowl and rub in the butter with fingertips until the mixture resembles breadcrumbs. Roll out the dough on a lightly floured counter. Cut out with into circles wit ay size of your choice. Place the scones on the prepared baking sheet, and brush the tops with the reserved milk. Bake for 8-10 minutes, or until the scones are golden brown.