1. 1. Combine Dry Ingredients: In a large mixing bowl, whisk together the whole wheat flour, protein powder, baking powder, ground cinnamon, and salt until well combined. Ensure there are no lumps of protein powder.

2. 2. Mix Wet Ingredients: In a separate medium bowl, whisk the egg, milk, maple syrup (or honey), and vanilla extract until smooth.

3. 3. Combine Wet and Dry: Pour the wet ingredients into the dry ingredients. Stir gently with a spoon or spatula until just combined. A few small lumps are okay; overmixing can lead to tough pancakes.

4. 4. Fold in Apples: Gently fold the finely diced apple into the pancake batter. Distribute the apple pieces evenly throughout the mixture.

5. 5. Heat the Griddle: Heat a non-stick griddle or large skillet over medium heat. Add about half a tablespoon of butter or coconut oil and let it melt and coat the surface.

6. 6. Cook the Pancakes: Pour about 1/4 cup of batter per pancake onto the hot griddle. Cook for 2-3 minutes per side, or until bubbles form on the surface and the edges look set. Flip carefully and cook for another 1-2 minutes until golden brown and cooked through. Repeat with the remaining batter, adding more butter or oil as needed.

7. 7. Serve Immediately: Transfer the cooked pancakes to plates and serve warm with your favorite toppings.