Barszcz biały is a traditional Polish soup made from fermented rye flour, giving it a distinct sour flavor. It is typically served hot and often includes ingredients like potatoes, sausage, and hard-boiled eggs. The soup is a staple in Polish cuisine, especially during festive occasions. This dish is part of the broader category of sour soups in Eastern European cooking. Barszcz biały is sometimes confused with barszcz czerwony, which is a beetroot soup. Both soups reflect the rich culinary heritage of Poland and are enjoyed for their unique tastes and comforting qualities.