Egg whites can serve as a fantastic yeast substitute ... self-raising flour is simply all-purpose flour mixed with baking powder and salt—making it a convenient self-leavening alternative.
Unlike all-purpose flour, which contains just one ingredient ... so it’s not a foolproof baking soda substitute. If you have your heart set on making cake-like cookies or an angel food cake ...
To recreate these effects, people who avoid gluten sometimes mix xanthan gum with gluten-free flour when baking. If you have a health condition that causes trouble swallowing (dysphagia,) xanthan ...