1 3/4 cups unbleached all-purpose flour
2 1/2 teaspoons baking powder
3 tablespoons sugar
1/4 teaspoon fine salt
6 tablespoons unsalted butter, cut into 1/2-inch cubes and refrigerated
2 teaspoons finely grated orange zest
1/4 cup dried currants
1 large egg
4 to 5 tablespoons heavy cream or half-and-half
For a richer, darker crust, brush the tops of the scones with heavy cream and sprinkle with sugar before baking.