Place oats, protein powder, baking powder, cinnamon, and salt into a blender and pulse for 30-45 seconds until the mixture resembles a fine flour.
In a different bowl, beat the eggs with the milk, maple syrup if using, and vanilla extract until well combined.
Add the wet ingredients to the dry mixture and gently stir just until you see some lumps remain.
Allow the batter to sit for about 5 to 10 minutes so it thickens nicely.
Warm your non-stick skillet or griddle over medium heat and coat lightly with cooking spray or coconut oil.
Spoon roughly 1/4 cup of batter onto the hot pan for each pancake.
Let the pancakes cook 2 to 3 minutes until bubbles form on top and the edges start to look firm.
Carefully flip the pancakes and cook an additional 1 to 2 minutes until they turn golden and are cooked through.
Keep cooking the rest of the batter the same way, adjusting the temperature on your stove as needed.
Serve your pancakes hot with toppings you love, like fresh berries, nuts, or a drizzle of maple syrup.