World's Best Scones! From Scotland to the Savoy to the U.S.

Step 1
Preheat the oven to 400 degrees F (200 degrees C). Grease a baking sheet.

Step 2
Make the scones: Sift flour, baking powder, sugar, and salt into a large bowl. Cut in butter with a pastry blender or by rubbing between fingers until lumps are the size of peas. Stir in currants.

Step 3
Whisk milk and sour cream together in a measuring cup; gently stir into flour mixture until dough is moistened, being careful not to overwork the dough.

Step 4
With floured hands, pat dough into 2- to 3-inch diameter balls. Place onto the prepared baking sheet and flatten lightly. Scones should slightly touch each other.

Step 5
Make the egg wash: Whisk egg and milk together. Brush the tops of scones with egg wash and let them rest for about 10 minutes.

Step 6
Bake in the preheated oven until the tops are golden brown, 10 to 15 minutes.