teaspoonful baking soda

Baking soda, chemically known as sodium bicarbonate (NaHCO₃), is a white, crystalline powder derived from the mineral trona or produced synthetically through the Solvay process. This weak base occurs naturally in mineral deposits and is one of the oldest chemical leavening agents used in baking and cooking. When heated or combined with acidic ingredients such as buttermilk, yogurt, lemon juice, or vinegar, baking soda undergoes thermal decomposition or acid-base reaction, releasing carbon dioxide gas that creates lift and rise in baked goods. It is odorless, slightly salty in taste, and highly soluble in water.

Baking soda functions as a chemical leavening agent in baked goods including cakes, cookies, quick breads, pancakes, and waffles, where it reacts with acidic components to produce carbon dioxide bubbles. It is also employed to adjust pH in doughs and batters, enhance browning through Maillard reaction promotion, and tenderize meat when used as a dry marinade. Beyond baking, baking soda is utilized in cooking to reduce bitterness in certain vegetables, neutralize acid in tomato-based sauces, and create the crispy texture in Asian noodle dishes. Its use requires careful measurement and timing, as excess baking soda imparts a soapy, metallic flavor to finished dishes.