⭐ Baking Powder (Best Nut-Free Option)
3 teaspoons baking powder per 1 teaspoon baking sodaBaking powder contains both an acid and a base, allowing it to act as a leavening agent without needing additional acidic components. In Teriyaki Sauce, it helps neutralize acidity and can contribute to a smoother texture by reducing harshness from acidic ingredients like soy sauce and mirin.
When substituting, use about three times the amount of baking powder because it is less concentrated than baking soda. Monitor the sauce for any slight tanginess and adjust sweetness if needed to maintain balance.
Compared to baking soda, baking powder may introduce a subtle acidity but generally preserves the sauce’s characteristic flavor and mouthfeel, making it the best all-around substitute.