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["Preheat the oven to 400 degrees.", "Spray six large 3"" muffin cups with no-stick spray and set aside.", "In a large bowl, stir together the all-purpose flour, whole-wheat flour, sugar, baking powder and orange peel.", "Make a well in the center of the mixture.", "In a small bowl, beat the egg whites until foamy.", "Stir in the buttermilk and applesauce.", "Add the buttermilk mixture to the flour mixture and stir just until moistened.", "Fold in the chocolate chips.", "Spoon the batter into the prepared cups, filling each 3/4 full.", "Bake for 15 to 17 minutes or until a toothpick is inserted in the center comes out clean.", "Cool the muffins in the muffin cups for 5 minutes.", "Then remove the muffins and cool on a wire rack."]
