Baking Soda and Lemon Juice (Best Option)
1/4 teaspoon baking soda + 1/2 teaspoon lemon juice per 1 teaspoon yeastBaking soda reacts with the acid in lemon juice to produce carbon dioxide gas, which mimics the leavening effect of yeast by creating bubbles and lightness in the batter or dough components of Pad Thai. This reaction is instantaneous, unlike yeast fermentation, so timing is crucial.
To maximize effectiveness, add the lemon juice immediately before cooking to ensure the reaction occurs during cooking rather than sitting. Avoid overmixing to preserve the gas bubbles.
The final dish will have a slightly lighter texture without the fermented depth yeast provides, but this is preferable in Pad Thai where a clean, fresh flavor is essential.