Preheat oven to 375°F. Lightly coat twelve 2-1/2-inch muffin cups with nonstick cooking spray or line with paper bake cups and coat insides of paper cups with nonstick cooking spray; set aside. In a large bowl stir together all-purpose flour, whole wheat flour, the 1/3 cup brown sugar, the baking powder, apple pie spice, and salt. Make a well in the center of the flour mixture; set aside.