Get all your ingredients together. Excellent!
Sift the sugar, brown rice flour, sweet rice flour, tapioca starch, and potato starch into a large mixing bowl.
Mix in the baking powder, salt, sugar, cinnamon, and xanthan gum.
Separate the eggs and set aside the yolk for later use.
Whisk one teaspoon of cream of tartar and the egg white until frothy. Set aside
Whisk the egg yolk, oil, vanilla extract, and low FODMAP milk in a separate container until well combined.
Combine the egg yolk solution and dry ingredients in the large mixing bowl and mix until you've got a smooth batter.
Fold in the egg whites.
Pour the batter into a waffle iron or waffle maker and cook until browned and done or fry in a little oil for 2 minutes a side and flip.