In a mixing bowl, whisk together the water (or milk) and eggs, mixing until well blended. Add the vanilla, if using, and pancake mix. Stir until just moistened. Some lumps will remain.
Add in Green food coloring to your batter and stir.
Fold in ½ to ¾ cups Lucky Charms marshmallows. Please be aware that the marshmallows will melt on the griddle.
Lightly grease the griddle with nonstick cooking spray.
Using a large scoop or ¼ cup, add the batter to the griddle. Cook for 3 to 4 minutes (until bubbles form on the top of the pancake) and then flip, continuing to cook until cooked through.
Serve with syrup, remaining marshmallows, and whipped cream, if desired.
Notes
You can make these pancakes any color that you would like them by using different food colors.