6 tablespoons sugar
5 tablespoons sugar
1 tablespoon baking powder
½ teaspoon salt
8 tablespoons (1 stick) unsalted butter, cut into ½-inch cubes and chilled
⅔ cup half-and-half
1 large egg, lightly beaten
1 large egg white, lightly beaten
For the shortcakes: While the berries macerate, adjust an oven rack to the lower-middle position and heat the oven to 425 degrees. Pulse together the flour, 3 tablespoons of the sugar, the baking powder, and salt in a food processor until combined. Scatter the butter pieces of the top and process until the mixture resembles coarse cornmeal, about 15 pulses. Transfer to a bowl.
Blend the half-and-half with the beaten egg and pour into the bowl with the flour mixture. Stir with a rubber spatula until large clumps form. Turn the mixture onto a lightly floured counter and knead lightly until the dough comes together.
Use your fingertips to pat the dough into a 9 by 6-inch rectangle about 1 inch thick. Cut out 6 dough rounds using a floured 2 ¾-inch biscuit cutter. Reform the remaining dough and cut 2 more rounds. Place the rounds 1 inch apart on a parchment-lined baking sheet, brush the tops with the beaten egg white, and sprinkle with the remaining 2 tablespoons sugar.
Bake the shortcakes until golden brown, 12 to 14 minutes. Let the shortcakes cool on the baking sheet for at least 10 minutes.
To assemble: Split each biscuit in half, laying the biscuit bottoms on individual plates. Spoon a portion of the fruit over each bottom, then top with a dollop of the whipped cream. Cap with the biscuit tops.