Frankfurter Würstel, also known as Viennese sausages, are a staple in Austrian cuisine. These sausages are made from a mixture of finely ground pork and beef, seasoned with spices, and stuffed into natural casings. They are typically boiled or grilled until cooked through and served with mustard and bread. Frankfurter Würstel are a popular street food in Vienna and can be enjoyed at sausage stands or in traditional Viennese sausage restaurants.