• 1 tsp. baking soda

Baking soda, chemically sodium bicarbonate (NaHCO₃), is a white crystalline salt that occurs naturally in mineral deposits and seawater, though most commercial production derives from the Solvay process. It is an alkaline compound with a slightly salty, mineral taste and odorless character. When exposed to moisture and heat, baking soda undergoes thermal decomposition, releasing carbon dioxide gas—the mechanism by which it acts as a leavening agent in baking.

In the kitchen, baking soda serves dual purposes: as a leavening agent in quick breads, cakes, and cookies, and as a pH neutralizer in sauces and batters. It differs from baking powder in that it requires an acid (buttermilk, yogurt, lemon juice, vinegar, brown sugar) to activate and produce immediate CO₂ release, whereas baking powder contains its own acidifying agents.

Baking soda is essential in quick-bread formulations, particularly in American and British baking traditions. It is used in pancakes, waffles, muffins, cakes, and cookies where immediate leavening is desired. In savory applications, baking soda neutralizes acidity in tomato-based sauces and tenderizes legumes by raising pH during cooking. It is also employed as a cleaning and deodorizing agent for bakeware and kitchen surfaces, and in rubs for meat to promote browning and texture improvement. The ingredient requires careful measurement—excess baking soda leaves a metallic or soapy aftertaste—and works optimally when mixed with acidic components immediately before baking.