Heat a skillet on the stove top to medium heat. While pan is heating, mash banana well and then mix in eggs, baking powder, and cinnamon. When pan is hot (water droplets should sizzle) Spray pan lightly with non-stick spray. Pour 2 tablespoons of batter at a time and cook until bottom appears set (30-60 seconds) flip with spatula and cook additional minute or less. Serve warm with butter and syrup.