ammonia

Ammonia (NH₃) is a colorless, pungent gas composed of nitrogen and hydrogen that occurs naturally in small quantities in the environment and is produced industrially on a massive scale. In culinary contexts, ammonia is encountered primarily as ammonium hydroxide (aqueous ammonia), a weak base solution formed when ammonia gas dissolves in water. The compound has a distinctive acrid odor and alkaline taste, and is used in food processing rather than as a finishing ingredient. Ammonium carbonate and ammonium bicarbonate, solid crystalline compounds derived from ammonia, are leavening agents employed in baking, particularly in traditional Northern European and Asian pastries.

Ammonia-based compounds serve specialized roles in food production rather than everyday cooking. Ammonium carbonate and ammonium bicarbonate function as chemical leavening agents in baking, producing carbon dioxide gas when heated to create light, crisp textures in cookies, pastries, and unleavened breads—particularly in Scandinavian and German baked goods and Asian crackers. These salts are preferred in recipes requiring rapid leavening without the browning associated with baking soda. Aqueous ammonia is used in industrial food processing, including meat curing and certain cheese productions, though it is not employed in home cooking. The compounds must be used judiciously to avoid imparting an undesirable alkaline flavor or aroma to finished products.