Baked Apple Dumplings With Cider Sauce

Name: Baked Apple Dumplings With Cider Sauce
Ingredients: 2½ cups all-purpose flour; 3 tablespoons sugar; 2 teaspoons baking powder; ¾ teaspoon salt; 10 tablespoons (1¼ sticks) unsalted butter, cut into ½-inch pieces and chilled; 5 tablespoons vegetable shortening, cut into ½-inch pieces and chilled; ¾ cup cold buttermilk; 6 tablespoons sugar; 1 teaspoon ground cinnamon; 3 tablespoons unsalted butter, softened; 3 tablespoons golden raisins, chopped; 4 Golden Delicious apples; 2 egg whites, lightly beaten