Preheat oven to 425°.
Lightly spoon flours into dry measuring cups and tablespoons; level with a knife. Combine flours, 1/4 cup sugar, and next 5 ingredients (through nutmeg) in a large bowl; stir with a whisk. Cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Add apple, 1/2 cup milk, and vanilla extract, stirring just until moist (dough will be sticky).
Turn dough out onto a lightly floured surface, and knead lightly 4 times with floured hands. Divide dough in half; pat each portion into a 6-inch circle on a baking sheet coated with cooking spray. Cut each circle into 5 wedges, cutting into but not through, dough. Brush tops of wedges with 2 tablespoons milk, and sprinkle evenly with 2 teaspoons sugar. Bake at 425° for 15 minutes or until golden. Serve warm.