
People recognize Swiss cheese for its “eyes,” or holes, along with its mild, nutty flavor. Cow’s milk cheese from Switzerland. This blog entry explores the Swiss cheese-making process, including the procedures, equipment, and science behind the holes.
The History of Swiss Cheese
Switzerland has made cheese since the 15th century. Farmers in the Swiss Alps manufactured the cheese to preserve milk during the summer when it was scarce. Making cheese required “curdling,” which involves adding vinegar or lemon juice to milk to separate the curds and whey. After molding, the curds matured in cool caves for months.
Swiss cheese developed its holes and nutty flavor over time. Cheese-making bacteria generate Swiss cheese holes. Next section: more on this.

The Swiss Cheese-Making Process
The Swiss cheese-making process involves several steps, including:
- Milk Production: The first step in making Swiss cheese is to produce the milk. High-quality milk comes from cows that graze on fresh grass. The cheese-making facility stores milk in enormous tanks after collection.
- Curdling: Now curdle the milk. Bacteria and rennet culture the milk starter. Bacteria acidify milk, while rennet coagulates proteins into curds. Cutting the curds into little pieces lets the whey flow off.
- Cooking: Cooking the curds in a large vat of boiling water expels additional whey and solidifies them. Controlling temperature and cooking time ensures cheese texture and flavor.
- Pressing: A massive press compresses cooked curds into a solid mass. The desired cheese texture and wetness determine the pressure and time of pressing.
- Salting: Salting the cheese after pressing enhances its flavor and preserves it. Rub salt on the cheese or soak it in brine.
- Aging: Aging concludes Swiss cheese production. The cheese matures for months in a cool, humid atmosphere. This is when the cheese develops its flavor and texture. The next part will explain how Swiss cheese develops holes during aging.

The Science of Swiss Cheese Holes
Propionibacterium freudenreichii causes Swiss cheese’s holes. This bacteria consumes lactic acid in cheese during curdling and creates carbon dioxide gas. Cheese holes form from trapped gas.
The type of bacteria employed, the temperature and humidity during maturing, and the curd particle size can affect Swiss cheese hole size and number. Larger curd fragments and greater bacteria levels cause larger holes, while smaller curd pieces and lesser bacteria cause smaller or no holes.
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Frequently Asked Questions about Swiss Cheese-Making
- Can Swiss cheese be made from goat’s or sheep’s milk?
- It is possible to make Swiss cheese from goat or sheep’s milk, but it is not “authentic”. Swiss cheese has a distinct flavor and texture due to cow’s milk.
- How long does it take to make Swiss cheese?
- The Swiss cheese-making process can take several months, depending on the desired flavor and texture of the cheese. Swiss cheese undergoes curdling and boiling, then matures for at least 60 days, with some varieties aging for 12 months.
- What is the best way to store Swiss cheese?
- To avoid drying, store Swiss cheese in a covered container or plastic wrap in the fridge. Taste and texture are greatest when consumed within a few weeks of purchase.
- Can Swiss cheese be frozen?
- Freezing Swiss cheese may change its texture and flavor. It is best to freeze Swiss cheese in small portions and to thaw it in the refrigerator before consuming it.
- Is Swiss cheese healthy?
- Swiss cheese is a good source of calcium, protein, and vitamin B12. A balanced diet should include moderation because it is high in fat and sodium.
To Wrap It Up
It’s distinctive holes and nutty flavor makes it a favorite for sandwiches, cheese plates, and other dishes. The Swiss cheese-making process is a time-honored tradition that involves several steps, including curdling, cooking, pressing, salting, and aging. The science behind the holes in Swiss cheese adds to its mystique and makes it a fascinating cheese to learn about and enjoy. Whether you’re a cheese aficionado or simply appreciate a good slice of cheese on your sandwich, Swiss cheese is a classic that will never go out of style.
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