In a large bowl, combine the whole wheat flour, protein powder, oats, cinnamon and baking powder.

In a separate bowl, combine the milk, egg, apple juice, and vanilla. Whisk well.

Pour the wet ingredients into the dry ingredients and stir until well combined. Add the diced apples and stir again.

Heat a large skillet over medium heat. When the pan is hot, coat with cooking spray. Pour the pancakes onto the pan and heat for 3-4 minutes or until small bubbles form in the batter. Flip and cook another 3-4 minutes.