Preheat waffle iron. Add oil if necessary to prevent sticking.
Place dry ingredients into a bowl. Whisk to combine ingredients.
In a separate bowl, combine wet ingredients, whisk well until mixed.
Combine wet and dry ingredients. Whisk until smooth. Pour waffle batter as needed onto waffle iron. If batter is too thick: add milk. If too runny: add flour.
Cook until stream stops or add desired.
If you add too much batter, this will happen (see photo). Don't worry, adjust as needed.