½ tsp baking soda

Baking soda is sodium bicarbonate (NaHCO₃), a naturally occurring alkaline compound commonly mined from mineral deposits or produced synthetically through the Solvay process. It is a fine white powder with a slightly salty, alkaline taste and odorless character. When exposed to heat or acidic conditions, baking soda decomposes to produce carbon dioxide gas, water, and sodium carbonate, which creates the leavening action essential to baking.

Baking soda differs from baking powder in that it requires an acid (such as buttermilk, lemon juice, vinegar, or cocoa) to activate its leavening properties, whereas baking powder contains acid already incorporated into its formulation. The alkaline nature of baking soda also affects the browning and flavor of baked goods, promoting surface browning and can neutralize acidic ingredients.

Baking soda serves as a leavening agent in quick breads, cakes, cookies, and pancakes when combined with acidic ingredients. It is essential in recipes containing buttermilk, sour cream, cocoa, or citrus components. Beyond baking, baking soda is used to tenderize meat, reduce bitterness in vegetables like greens, and adjust pH in various preparations. In some Asian cuisines, it is employed to create a crispy exterior on fried foods and to develop specific textures in noodles and dough products.