Preheat the waffle iron.
Whisk the eggs in a large bowl.
Stir in the juice, butter, maple syrup, cinnamon and vanilla.
Add the flour, baking powder, and salt and stir until well combined.
Brush both the top and bottom surface of the waffle iron with butter, then ladle in enough batter to cover the bottom surface of the iron.
Cook until the steaming stops or the waffle is golden brown.