Baking Soda and Lemon Juice (Best Option)
1/4 teaspoon baking soda + 1/2 teaspoon lemon juice per 1 teaspoon yeastBaking soda is a base that reacts with acidic lemon juice to produce carbon dioxide gas, which helps dough rise similarly to yeast fermentation. This reaction is immediate and does not require proofing time, making it ideal for quick curry doughs or batters.
To use this substitute effectively, mix the baking soda into the dry ingredients and add lemon juice to the wet ingredients just before combining to maximize gas production. Avoid overmixing to retain the leavening effect.
Compared to yeast, this substitute lacks the complex fermentation flavors but maintains a similar airy texture, which is generally acceptable in curry dishes where yeast flavor is not dominant.