Source: Look for whole-wheat pastry flour in the natural-foods section of large supermarkets and natural-foods stores. Sources include King Arthur Flour, (800) 827-6836, www.bakerscatalogue.com, and Bobs Red Mill, (800) 349-2173, www.bobsredmill.com.Tip: No buttermilk° Mix 1 tablespoon lemon juice into 1 cup milk.
Preheat oven to 400°F. Coat a 12-cup muffin pan with cooking spray.
Combine coconut, 2 tablespoons all-purpose flour, 2 tablespoons brown sugar and 2 tablespoons macadamia nuts in a small bowl. Drizzle with 1 tablespoon oil; stir to combine. Set aside.
Whisk the remaining 3/4 cup all-purpose flour, whole-wheat flour, baking powder, baking soda, salt and cinnamon in a medium bowl. Whisk the remaining 1/2 cup brown sugar, the remaining 1 tablespoon oil, egg, egg white, buttermilk, butter and coconut (or vanilla) extract in a medium bowl until well combined. Make a well in the center of the dry ingredients and pour in the wet ingredients; stir until just combined. Add blueberries and the remaining 3 tablespoons nuts; stir just to combine. Divide the batter among the prepared muffin cups. Sprinkle with the reserved coconut topping and gently press into the batter.e the muffins until golden brown and a wooden skewer inserted in the center comes out clean, about 20 minutes. Let cool in the pan for 10 minutes, then remove from the pan and let cool on a wire rack at least 5 minutes more before serving.