01 - Set oven temperature to 400°F and line a baking sheet with parchment paper.
02 - Whisk together flour, sugar, baking powder, and salt in a large bowl.
03 - Cut cold butter into the flour mixture using a pastry cutter or fingertips until texture resembles coarse crumbs.
04 - Whisk milk and egg together in a separate bowl.
05 - Pour wet ingredients into dry ingredients and stir gently just until combined; avoid overmixing.
06 - Fold in raisins, currants, or chocolate chips if desired.
07 - Turn dough onto a lightly floured surface and pat into a 1-inch thick round.
08 - Slice dough into 8 wedges or use a round cutter and place pieces onto prepared baking sheet.
09 - Lightly brush scone tops with milk to achieve a golden finish.
10 - Bake for 12 to 15 minutes until golden brown. Cool slightly on a wire rack before serving.