Heat the oven to 350°F with a rack in the middle position. Set a wire rack in a rimmed baking sheet. In a medium bowl, stir together the apples, lemon juice, 1 tablespoon of the white sugar and ½ teaspoon of the cinnamon. Set aside. In a second medium bowl, whisk together both flours, the baking powder, salt, allspice, remaining 1½ teaspoons cinnamon and the remaining 4 tablespoons white sugar. In a third medium bowl, whisk together the eggs, milk, ½ cup of the sour cream and the vanilla. Add the milk mixture to the flour mixture and whisk just until the batter is evenly moistened; do not overmix.