Käsekrainer is a popular Austrian sausage that originated in Vienna. It is made from a mixture of pork and beef, seasoned with garlic and spices, and stuffed with chunks of cheese. When cooked, the cheese melts and creates a deliciously gooey filling. Käsekrainer is often grilled or pan-fried and served with mustard and bread. It is a beloved street food in Vienna and can be found at many sausage stands throughout the city.