Bułka z pieczarkami is an authentic Polish mushroom roll consisting of a bread roll that is stuffed with mushrooms and onions. Other optional ingredients include grated cheese, sausages, or heavy cream. The rolls are served hot and crunchy, topped with ketchup, mustard, or a combination of both.

Although they are somewhat overshadowed by more popular street food fare such as burgers and hot dogs, mushroom rolls are still a typical street food item in Poland, sold at numerous food kiosks and street stalls across the country.