The main thing that a tourist visiting Krakow must remember: obwarzanek krakowski is not a bagel or a pretzel - as it is often confusingly called. The name of this delicacy comes from the method of production, i.e. Parboiling (in Polish:obwarzanie). It involves dipping in hot water before baking. But before that, it needs to be prepared. From salt, sugar, yeast, water, flour and fat, two rolls of dough, the so-called sulki, are made. Then they are intertwined with each other and their ends are joined to form a circle with a diameter of 12 to 17 centimetres. Obwarzanki are sprinkled with sesame, salt or poppy seeds. They are sold on Krakow's streets from special trolleys. In 2010, the obwarzanek entered the list of protected products of the European Union. There are many rules associated with EU labelling. For example, only a certified person can produce a given product. The original obwarzanek can only be produced within Kraków, and Kraków and Wieliczka poviats.