Place oats, protein powder, baking powder, cinnamon, and salt in a blender and process for 30 to 45 seconds until the mixture turns into a fine flour.
In a separate bowl, beat the eggs with milk, maple syrup if using, and vanilla extract until well combined.
Add the wet ingredients to the dry mixture and stir gently until just mixed, allowing some lumps to remain.
Set the batter aside for 5 to 10 minutes to allow it to thicken.
Warm a non-stick skillet or griddle over medium heat and apply a light coating of cooking spray or coconut oil.
Spoon approximately 1/4 cup of batter onto the skillet for each pancake.
Cook for 2 to 3 minutes until bubbles appear on top and edges look firm.
Turn the pancakes over and cook for an additional 1 to 2 minutes, or until golden and fully cooked.
Continue cooking the remaining batter, adjusting the heat as necessary to prevent burning.
Serve the pancakes hot with your preferred toppings like fresh berries, nuts, or a drizzle of maple syrup.