Śląski żur na maślance: Silesian Buttermilk Soup
Śląski żur na maślance is a regional soup from Opolskie in Upper Silesia. It belongs to the broader family of sour rye soups called żur, but this particular version uses cultured buttermilk rather than fermented rye starter. Poland's traditional-product record describes it as a fluid grey soup with a sour taste and a pronounced mushroom note.
The Opolski Bifyj regional publication gives an eight-serving recipe made with buttermilk, water, dried mushrooms, potatoes, flour, butter and seasonings. It explains that quick buttermilk versions were prepared when the rye starter was not ready or the household wanted a change from starter-based soup. The measured home version here follows that published preparation: potatoes and mushrooms simmer first, then buttermilk and a flour slurry are added. The finished soup should be tangy, lightly thickened and grey-beige, with soft potatoes and mushrooms still visible.
The source suggests serving the soup with white sausage. Here it remains a separate optional accompaniment, not stirred into the base soup or counted in its nutrition. This is a practical measured adaptation of one published regional version, not a claim that every Silesian household used the same formula.
