Spray a nonstick griddle with cooking spray and place over medium/medium-high heat.
In a small blender (I used my NutriBullet), add the banana, eggs, and vanilla extract. Blend until smooth.
Add the protein powder, sweetener, and baking powder, then blend again.
Scoop ~¼ cup of the batter onto the griddle. Cook until bubbles no longer appear on the surface and the edges appear dry. Flip and cook the other side. Continue until all the batter is used up. Serve and enjoy!