In a large mixing bowl, whisk together the oat flour, chocolate protein powder, cocoa powder, baking powder, and sea salt until well combined.
In a separate medium bowl, beat the eggs and egg whites, then stir in the Greek yogurt, almond milk, and vanilla extract until the mixture is smooth.
Make a well in the center of the dry ingredients and pour in the wet mixture, stirring gently with a spatula until just combined; avoid over-mixing.
Allow the batter to rest for 5 to 8 minutes; this allows the oat flour to hydrate, resulting in a thicker, fluffier pancake.
Heat a large non-stick griddle or skillet over medium-low heat and add the coconut oil, swirling to coat the surface evenly.
Pour approximately 1/4 cup of batter for each pancake onto the hot skillet, leaving space between them.
Cook for 2-3 minutes until small bubbles begin to form on the surface and the edges look set.
Carefully flip the pancakes and cook for an additional 1-2 minutes until they are springy to the touch and cooked through.
Serve the pancakes warm, divided between two plates, and top with an extra spoonful of Greek yogurt if desired.