In a medium mixing bowl, whisk together your all-purpose flour, baking powder, cinnamon, and salt.
In a separate large bowl, mash your overripe bananas until smooth. Crack in a large egg and whisk them together until fully combined.
Pour in the milk and stir until it's well mixed. Gradually add your dry mixture into the wet ingredients, folding gently.
Heat a lightly oiled nonstick pan over medium heat.
Pour about ¼ cup of batter into the pan, forming circles that are evenly spaced apart. Cook for about 2-3 minutes, or until bubbles form on the surface.
Carefully flip each pancake and cook for another 1-2 minutes on the other side.
Once cooked, transfer your pancakes to a warm plate. Serve hot with banana slices and maple syrup.