Yellow cheese is not just a breakfast addition – it is an important part of the daily diet, capable of enriching the flavour of the simplest dishes and adding refinement to even the most sophisticated meals.
At OSM Sierpc, we know well that flavour is the result of experience, passion and tradition. That is why, since 1927, we have been creating cheeses that not only meet consumers’ culinary needs but also set quality standards in the market. Our flagship products – Królewski and Kasztelan – offer a variety of flavours and textures to satisfy every cheese lover.
Królewski cheese – a flavour that is hard to resist
Królewski Cheese is our pride – a unique product that has held the leading position in the market for years, as confirmed by Nielsen research data. Its intense, distinctive flavour and velvety texture make it an ideal choice both for connoisseurs and for those just beginning their journey with aged cheeses.
In Royal Cheese, you will notice notes of nuts, a delicate apricot sweetness, and a subtle hint of honey. Thanks to the aging process, every bite delights with depth of flavour. This cheese is perfect for a cheese board – paired with fresh bread, fig preserves, pears, or melon.
It forms a harmonious pairing with a glass of dry wine, while its Light version – lower in fat but equally refined – goes perfectly with wholemeal bread and crisp lettuce. Królewski Light is the ideal choice for those who don’t want to compromise on flavour but prefer lighter options – less fat, the same quality and refinement.
Królewski Smoked is a suggestion for connoisseurs in search of deep, bold notes. Smoked in natural wood smoke, it gains an intense aroma and noble, decisive character. It works beautifully in grilled dishes, casseroles, and as an elegant starter – accompanied by olives, nuts, or dried fruit.
Kasztelan cheese – everyday simplicity in a refined form
Kasztelan Gold cheese is an excellent choice for those who appreciate a flavour that blends harmoniously into everyday cooking. Its delicate milky and nutty note makes it a great match for a wide range of dishes – from toast and sandwiches, to scrambled eggs and soups, and even one-pot meals. It is a cheese that goes well with other products – naturally complementing simple, homemade ingredients.
Kasztelan Classic – versatile and reliable. Mild, yet with a noticeable character – it doesn’t overpower, but subtly enhances the flavour of the dish. It is ideal for both a morning breakfast and a quick, hearty lunch.
For fans of gentler flavours, there is Kasztelan Creamy – an even milder version of Kasztelan. Its creamy texture and subtle milky aroma make it a perfect match for fresh bread, vegetables, or herbs such as tomato, cucumber, or chives. It is a flavour that brings generations together and suits the whole family.
Kasztelan Smoked, on the other hand, is a suggestion for those who value more pronounced culinary experiences. The aroma of natural smoking gives it intensity, making it ideal as an ingredient in warm dishes and snacks with a deeper flavour. Just like Królewski Smoked, this cheese has a strong personality – for those who enjoy cheese playing a leading role.
How to choose the perfect cheese?
Choosing the right cheese depends on the occasion, individual taste preferences and the dish you are planning to prepare. Here is a short guide:
- For a cheeseboard: Królewski and Królewski Smoked – intense, bold flavours that pair perfectly with fruit and wine.
- For everyday sandwiches and toast: Kasztelan Classic – mild and versatile, it goes well with a wide range of toppings.
- For light snacks and salads: Kasztelan Smoked – brings a subtle smoky aroma and pairs wonderfully with rocket, grilled vegetables, or cranberry chutney.
- For lovers of mild flavours: Kasztelan Creamy – creamy and delicate, perfect for salads, wraps, or light bakes.
- For those seeking something exceptional:
Royal Light – light yet refined. Perfect for a light dinner or as part of a healthy snack.
OSM Sierpc cheeses – timeless flavours
Our cheeses are the result of many years of experience, passion and attention to every detail – from the quality of the raw ingredients to the final product. That is why Królewski and Kasztelan have enjoyed the trust and affection of consumers for years.
These are cheeses that meet a wide variety of culinary needs – from everyday breakfast, through family dinners, to elegant evening meals.
Looking for a flavour that will stay with you?
Reach for OSM Sierpc cheeses – naturally matured, made with heart.




