1. Preheat oven to 400°F. Coat a 15×10-inch baking pan with cooking spray. Line bottom of pan with parchment paper.
2. In a medium bowl whisk together flours, baking powder, 2 tsp. of the cinnamon, and the salt.
3. In a large bowl whisk together milk, eggs, ¼ cup of the melted butter, the maple syrup, and vanilla. Core and coarsely shred two of the apples (measure 2 cups shredded apples). Stir shredded apples into milk mixture.
4. Stir flour mixture into milk mixture just until combined. Pour batter into prepared baking pan, spreading evenly.
5. Core and thinly slice the remaining two apples and arrange slices on top of batter. Lightly brush apple slices with the 1 Tbsp. melted butter. In a small bowl stir together sugar and the remaining ¼ tsp. cinnamon. Sprinkle over apples.
6. Bake about 25 minutes or until edges are golden brown and a toothpick comes out clean. Let stand 10 minutes before serving. Cut into 12 squares and drizzle with additional maple syrup. Makes 12 servings (1 piece each).
PER SERVING 239 cal., 8 g fat (4 g sat. fat), 77 mg chol., 296 mg sodium, 36 g carb., 4 g fiber, 10 g sugars, 7 g pro.