The process of inducing acidity in milk, often to a desired level, involves introducing a bacterial culture or acid directly into the liquid. This transformation alters the milk’s flavor and texture, rendering it suitable for specific culinary applications, like baking and cheesemaking. For instance, milk can be acidified through the addition of lemon juice or vinegar, or by allowing naturally occurring bacteria to ferment the lactose present.
Acidifying milk serves varied purposes. It can impart a characteristic tang to baked goods, enhance the rise and texture of certain recipes by reacting with baking soda, and contribute to the curdling process essential in cheesemaking. Historically, it was also a means of preservation, retarding spoilage and extending the shelf life of milk before modern refrigeration techniques were widespread.
