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Eyes are the round holes that are a characteristic feature of some Swiss-type cheeses [1] (e.g. Emmentaler cheese) and some Dutch-type cheeses. The eyes are formed by bubbles of carbon dioxide gas during the cheesemak...
May 29, 2015 · It’s known for its sweet and nutty flavor, its buttery yellow color and its distinctive holes, but over the years, Swisscheese’s distinctive “eyes” have been disappearing. Now, the AFP...
Sep 15, 2025 · The holes in Swisscheese form thanks to a bacterial culture called Propionibacteria, or Props. These bacteria are naturally found in hay, grasses, and soil, and can be present in raw milk.
Oct 9, 2025 · According to U.S. Dairy, a farmer-funded trade group, the eyes in Swisscheese derive from a genus of bacteria often found in raw milk called Propionibacteria, or Props. Prior to the advent...
Oct 15, 2025 · But as it turns out, the holes in Swisscheese aren’t random – they’re triggered by the presence of tiny, microscopically small particles of hay that find their way into the milk.
Apr 12, 2025 · They found that the mysterious holes appearing in slices and hunks of Swisscheese are actually caused by tiny flecks of hay present in the milk at the time of cheesemaking, contrary to bacteria as previ...
6 days ago · Some modern producers intentionally make blind Swiss for sliced deli cheese, where holes can be inconvenient for sandwich-making. Which Cheeses Have Holes and Which Don’t Only cheeses made with Propioniba...
Sep 2, 2022 · Jarlsberg is often grouped with Swiss-style cheeses, but it’s a much more deliberately engineered example of eye formation. Developed in Norway in the mid-20th century, Jarlsberg uses propionic acid bact...
Apr 11, 2024 · When these bubbles pop, they form holes. In the cheese world, these holes are known as “eyes.” The size of the eyes are determined by the temperature, storage, time, and acidity levels in the cheese. So...
Jun 23, 2025 · While the size and number of holes, or “eyes,” in Swisscheese are often associated with quality, they are not the sole determinant. Generally, larger and more evenly distributed eyes indicate a successf...
