Apple Whole Wheat Muffins (King Arthur Flour) - cooking recipe

Ingredients

1 cup whole wheat flour (4 ounces)
1 cup unbleached all-purpose flour (4-1/4 ounces)
1 teaspoon baking powder
1 teaspoon baking soda
1/4 teaspoon salt
1 tablespoon cinnamon
1/2 cup unsalted butter, at room temperature (1 stick, 4 ounces, or for a healthier muffin, use 1/4 c. canola oil and 1/4 c. applesauce)
1/2 cup granulated sugar (3 1/2 ounces)
3/4 cup dark brown sugar, divided (5 5/8 ounces)
1 large egg, lightly beaten
1 cup buttermilk (or a mixture of the two) or 1 cup yogurt (or a mixture of the two, 8 ounces)
2 large apples, peeled, cored, and coarsely chopped or 1 1/2 cups dried apple nuggets

Preparation

Preheat the oven to 375\u00b0F Grease and flour a 12-cup muffin tin, or line with papers and grease the insides of the papers.
Mix together the flours, baking powder, baking soda, salt, and cinnamon, and set aside. In a separate bowl, cream the butter and add the granulated sugar and 1/4 cup of the brown sugar Beat until fluffy. Add the egg and mix well; stop once to scrape the sides and bottom of the bowl. Mix in the buttermilk gently. (If you over-mix, the buttermilk will cause the mixture to curdle.) Stir in the dry ingredients and fold in the apple chunks.
Divide the batter evenly among the prepared muffin cups, sprinkling the remaining 1/2 cup brown sugar on top. Bake for 25 to 30 minutes, or until a toothpick inserted into the center of a muffin comes out clean. Remove from the oven, cool the muffins for 5 minutes in the tin, then turn them out onto a rack to finish cooling completely.