Why the best mozzarella is defined by the way it is cut and stretched

Food & Drink · Published 3 October 2026 Swipe more like this →

In short: Mozzarella is more than a pizza topping; it is a masterclass in the pasta filata technique. Named for the Italian word for cutting, this semi-soft cheese relies on precise pH levels to achieve its signature stretch. From tiny perlene to braided treccia, its variety is as vast as its history.

The name mozzarella derives from the Italian verb mozzare, meaning to cut off, referencing the method of separating portions from a mass of stretched curd. This process, known as pasta filata, requires the curd to reach a specific pH level of 5.2 to 5.5. At this stage, a cheesemaker kneads the mass by hand until it transforms into a smooth, shiny paste, which is then pulled and lopped off into individual portions.

While often associated with cow's milk, or fior di latte, the most prestigious variety is mozzarella di bufala, made from the milk of Italian buffalo. Genetic research suggests these animals arrived in Italy via migration from India in the 7th century CE. Today, the production of mozzarella di bufala campana is strictly regulated under European Union and UK law as a protected designation of origin (PDO), ensuring it comes from specific areas in Campania, Lazio, Apulia, and Molise.

Fresh mozzarella is traditionally consumed the day it is made, as its high moisture content makes it prone to softening and developing a sour flavor over time. In Naples, some locals prefer the cheese once it has relaxed for a few hours, though those living closer to rural dairy farms often favor the firmer, immediate product. For commercial longevity, low-moisture variants are produced by adding citric acid and desiccating the curd, allowing for a shelf life that can extend up to six months for shredded versions.

The cheese is categorized by size and shape, ranging from cherry-sized ciliegine to egg-sized ovolini and bite-sized bocconcini. Some are even twisted into a plait known as treccia. While fresh mozzarella has held traditional speciality guaranteed (TSG) status since 1996, the global market has adapted the product for industrial use, creating specialized low-moisture cheeses designed to minimize browning on pizzas.

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