Heat oven to 375. Put flour, baking powder, baking soda, nutmeg, and salt into a large bowl; stir to mix well. Add butter and cut in with a pastry blender or rub in with your fingers, until mixture looks like fine granules. Add raisins and sugar; toss to distribute evenly. Add egg yolk to buttermilk in a measuring cup and whisk with a fork to blend. Pour over the flour mixture and stir with a fork until a soft dough forms. Turn out dough onto a lightly floured surface and give 10-12 kneads. Roll (or pat) out to desired thickness (1/2). Cut with 3-inch biscuit cutter. In small bowl, beat the egg white with a fork until just broken up. Brush top of each scone with egg white and sprinkle lightly with sugar. Bake 18 to 22 minutes, until medium brown.
This scone recipe is provided for entertainment purposes and not for redistribution. There may be errors in this publication so before hosting your next tea party, be sure to perfect your preparation method and fine tune your ingredients. Although scones are easy to prepare, there is an art to making them the right consistency and thickness. Don't forget to include Imperial Tea Garden® brand teas at your next tea party.