In a medium mixing bowl, combine pancake mix and sugar.
In a small mixing bowl, beat egg and peanut butter; add milk and water.
Stir this into dry ingredients just until moistened.
Pour batter by ¼ cupfuls onto a lightly greased medium-hot griddle. Turn when bubbles form on top of pancakes; cook until second side is golden brown.
Repeat with remaining batter.
Peanut Butter Sauce:
In a small bowl, microwave the ½ cup creamy peanut butter for 20 seconds, and stir until smooth and melted. Pour over warm pancakes. Pour maple syrup over all, if using.
Serve each pancake with a tablespoon of peanut butter on top, and maple syrup, if desired!