Baking Soda + Cream of Tartar (Best Option)
1/4 teaspoon baking soda + 1/2 teaspoon cream of tartar per 1 teaspoon baking powderThis combination mimics the chemical reaction of baking powder by combining an alkaline component (baking soda) with an acid (cream of tartar), producing carbon dioxide gas for leavening. In Pad Thai, this ensures the noodles or batter components remain light without introducing off-flavors.
For best results, mix the two powders thoroughly before adding to the dish to ensure even leavening. Avoid adding extra liquid as it may alter the batter consistency.
Compared to commercial baking powder, this substitute maintains the intended texture and flavor balance in Pad Thai, making it the most reliable alternative.