Awaken the Liquids : In a large mixing bowl, combine the egg, egg whites, low-fat buttermilk, maple syrup, avocado oil, and vanilla extract. Whisk gently until the mixture is uniform in color and consistency.
Sift the Powders : In a separate medium bowl, add the white whole wheat flour, vanilla protein powder, low-sodium baking powder, cinnamon, and nutmeg. Use a whisk to thoroughly combine the dry ingredients and break up any clumps.
Marry the Mixtures : Pour the dry powder mixture into the bowl with the wet ingredients. Using a silicone spatula, fold the ingredients together until just moistened. Do not overmix; a few small lumps in the batter are expected and desirable.
Hydrate the Batter : Set the prepared batter aside, uncovered, for 8 minutes. This resting period allows the whole wheat flour and protein powder to fully absorb the liquids, resulting in a thicker, more tender final product.
Prepare the Cooking Surface : While the batter rests, place your large skillet over medium-low heat. Add a very thin layer of avocado oil or unsalted butter, wiping out any excess with a paper towel. The surface should be hot enough that a drop of water sizzles and evaporates on contact, around 350°F (175°C).
Cook the Pancakes : Using a ¼-cup measure, pour the batter onto the preheated skillet to form small, 4-inch rounds, leaving space between each. Cook for 2 to 3 minutes on the first side, or until bubbles appear across the surface, the edges look dry and matte, and the bottom is a rich golden-brown.
The Final Flip : Carefully slide a thin spatula underneath each pancake and flip. Cook the second side for an additional 60 to 90 seconds, just until cooked through and golden. Transfer the finished cakes to a plate. Repeat the process with the remaining batter, adding a touch more oil to the skillet as needed.
Plate and Serve : Serve the pancakes immediately while warm. Garnish with your choice of toppings, such as fresh berries, a small pat of unsalted butter, or a drizzle of maple syrup.