In a mixing bowl, mix the flour, sugar and baking powder.
In a separate bowl, lightly beat the egg yolks. Add the milk, butter and vanilla to the egg yolks.
Add the wet mixture to the dry ingredients. Now beat the egg whites until stiff peaks form (you can do this manually or with an electric hand mixer).
Add the egg whites to the batter mix and stir to combine.
Now add in the green food coloring. Mix until you get the desired green color. You may need to add a lot depending on the strength of your food coloring.
When baking in the waffle maker, make sure to set the waffle maker on the lowest setting possible and monitor the waffles. If overcooked, the waffles will turn brown so start off really low and check often for the first one.
Break the waffle up into 3 pieces to form the Christmas Tree.
Cut out a star out of construction paper and tape to a toothpick to put on top of the tree.
Serve with Christmas sprinkles and maple syrup.