Baking Soda and Lemon Juice (Best Option)
1/4 teaspoon baking soda + 1/2 teaspoon lemon juice per 1 teaspoon yeastBaking soda reacts immediately with lemon juice to produce carbon dioxide, which can replicate the slight rise and lightness yeast might impart in dough or batter components of a stew. The acid also adds a subtle tang that simulates yeast fermentation flavors.
To use this substitute effectively, add the lemon juice to the liquid portion of the stew and mix in the baking soda just before cooking to ensure maximum reaction. Avoid adding too early to prevent loss of leavening power.
Compared to yeast, this combination does not require proofing and acts instantly, making it ideal for stews where yeast's role is minimal. The flavor impact is less complex but sufficient for most stew recipes.