01 - Combine the mashed bananas, eggs, milk, and vanilla extract in a blender. Blend on medium speed until the mixture is completely smooth and no banana lumps remain.
02 - Add the rolled oats, protein powder, baking powder, cinnamon, and salt directly to the blender. Blend until a smooth, uniform batter forms, scraping down the sides as needed.
03 - If using chia seeds, flaxseed, walnuts, or chocolate chips, stir them into the batter by hand. Let the batter rest for 2 to 3 minutes to allow it to thicken slightly.
04 - Heat a non-stick skillet or griddle over medium heat. Lightly grease the surface with cooking spray or a small amount of butter or oil.
05 - Pour approximately 1/4 cup of batter per pancake onto the hot skillet. Cook for 2 to 3 minutes until bubbles form across the surface and the edges begin to set. Flip each pancake and cook for another 1 to 2 minutes until golden brown and cooked through.
06 - Transfer cooked pancakes to a warm plate and repeat with the remaining batter. Serve immediately with fresh berries, nut butter, or maple syrup.