Swiss cheese (Emmental-style cheese and its characteristics)

How Swiss‑style cheese is made

The defining process begins with pasteurised or raw cow's milk that is curdled by starter cultures producing lactic acid. Other bacteria, notably propionibacteria, convert that lactic acid into carbon dioxide gas during a warm stage of ripening. The carbon dioxide slowly gathers into pockets that become the holes. For more on related cheese varieties see types of Swiss-style cheeses and the specific role of Emmental techniques at Emmental. For technical background on the microbes involved see propionibacteria and how they transform milk components.

The size and number of eyes depend on factors such as the acidity of the curd, the temperature and duration of warm ripening, moisture retained in the cheese, and the activity level of the gas‑forming bacteria. Lactic acid is a key substrate for the process; readers may consult a general note on lactic acid and the gas produced, carbon dioxide. A wheel that develops very few or no holes is commonly called a "blind" cheese; the term and causes are explained at blind and the term for the holes themselves at eyes.

History and geographic context

Emmental originally refers to cheeses from the Emme valley in Switzerland. The techniques spread over centuries within Europe, so Emmental‑style cheeses have long been made in neighboring countries as well. Today many countries produce cheeses following the Emmental method; some use pasteurisation and industrial starter cultures to create consistent eye formation and flavor. Because Emmental and "Swiss cheese" have become culinary synonyms in some regions, the name does not always indicate Swiss origin.

Characteristics, uses and distinctions

• Typical characteristics: pale yellow color, smooth, springy body, nutty to sweet flavor, and varying eye sizes.
• Age and temperature control produce flavor differences: longer aging intensifies nuttiness and complexity.
• Common uses: sliced for sandwiches, melted in fondues and gratins, cubed for platters, and paired with light wines or beers.
• Distinctions: Emmental (traditional Swiss origin) vs other regional analogues (e.g., Jarlsberg‑style, generic "Swiss" slices); Gruyère and other alpine cheeses are similar but usually have fewer or no holes and a firmer, often more complex, flavor.

Producers today blend traditional craft methods with modern quality controls to manage eye formation and flavor consistency. Whether labelled "Emmental," "Swiss cheese," or a local variant, these cheeses remain popular for their versatile melting properties and approachable taste.

For further reading on production and varieties, consult resources listed under the practical and technical headings above: overview of styles, Emmental, the bacteriology at propionibacteria, transformations in milk, the chemistry of lactic acid and carbon dioxide, plus notes on the eyes and what makes a blind wheel.