01 - Set the oven to 400°F and line a baking sheet with parchment paper.
02 - Whisk together flour, baking powder, salt, and black pepper in a large bowl.
03 - Add the cold, cubed butter to the dry ingredients and cut in using a pastry blender or fingertips until the mixture resembles coarse crumbs.
04 - Stir in the grated cheddar, Parmesan, chives, and parsley evenly.
05 - Whisk together milk and egg in a separate bowl, then pour into the flour mixture and gently combine until just incorporated. Avoid overmixing.
06 - Turn the dough onto a lightly floured surface and pat into a 1-inch thick disk.
07 - Slice the disk into 8 wedges and arrange them on the prepared baking sheet, spaced apart.
08 - Lightly brush the wedge tops with milk to enhance browning.
09 - Bake for 16 to 18 minutes until the scones turn golden brown and are cooked through.
10 - Allow to cool slightly; serve warm or at room temperature.