Ingredients

1/2 cup diced candied orange peel 

1/2 cup golden raisins 

1 teaspoon finely grated orange zest 

1/4 cup Grand Marnier or other orange-flavored liqueur 

2 cups cake flour (not self-rising), sifted 

1 1/2 cups all-purpose flour, plus more for rolling 

1 stick cold unsalted butter, cut into small pieces 

1/4 cup plus 2 tablespoons granulated sugar 

1 tablespoon plus 2 teaspoons baking powder 

Coarse salt 

1 cup cold heavy cream 

1 large whole egg plus 1 large egg, separated 

Fine sanding sugar, for sprinkling

Preparation

Stir together candied orange peel, raisins, orange zest, and liqueur in a small bowl. Cover with plastic wrap, and refrigerate for 1 day.

Preheat oven to 350 degrees. Whisk flours together in a large bowl. Transfer half to a food processor, and add butter. Pulse to cut in butter (the largest pieces should be the size of small peas). Add granulated sugar, baking powder, and 1 teaspoon salt to remaining flour in bowl; whisk to combine. With a pastry blender or your fingertips, work in flour-butter mixture until mixture resembles coarse meal.

Whisk together cream, whole egg, and egg yolk. Make a well in the center of flour mixture, and pour in half of cream mixture. Draw dry ingredients over wet ingredients with a rubber spatula, scraping bottom of bowl to incorporate all dry crumbs. Add remaining cream mixture, and gently mix just until incorporated (do not overwork dough).

Turn out dough onto a lightly floured work surface, and press dough into a 6-by-9-inch rectangle. Sprinkle dried-fruit mixture evenly over dough. With a short side facing you, fold rectangle into thirds, as you would a letter. Rotate dough a quarter-turn clockwise. Roll out dough to a 6-by-9-inch rectangle, folding and rotating once more.

Pat dough into a 1 1/4-inch-thick rectangle with floured hands, and cut out as many rounds as possible with a floured 2-inch round biscuit cutter. Gather scraps, reroll once, and cut out more rounds (you should have a total of 16).

Place scones 2 inches apart on parchment-lined baking sheets. Lightly beat egg white, and brush tops; sprinkle with sanding sugar. Bake until golden brown, about 25 minutes, rotating sheets halfway through. Let cool on sheets. Serve warm or at room temperature.