Currywurst is prepared differently from region to region. Sometimes the sauce is heated, sometimes seasoned with curry powder. The consistency ranges from pasty to thin, in some areas or individual snack bars it is plain ketchup.
Berlin currywurst
There are two basic varieties of Berlin curry sausage: with or without casing. The sausages without casings are cylindrical and whitish in colour, comparable to Bavarian woollen sausages. Requirements for the quality of Berliner Currywurst were agreed as early as 1951 between the Berlin authorities and the butchers' guild; this resulted in a so-called Berliner Verkehrsauffassung, which was later laid down by the competent Land authority and published in the Allgemeine Fleischer-Zeitung on 20 August 1967. According to this opinion, which was recognised in Berlin decades later, a fine, non-cured and non-smoked sausage of medium quality with a maximum addition of extraneous water of five per cent must be used as a sausage. Simple qualities or other sausages may therefore not be offered as 'Currywurst', but for example as 'Bratwurst mit Curry' or 'Dampfwurst mit Curry'.
Both varieties are first fried whole, usually in a fat pan about half covered with hot fat. When served, the sausage is cut by hand into bite-sized pieces - some traditional snack stands, such as Krasselt's Imbiß in Berlin-Steglitz, only serve currywurst with an angled cut. In this case, both halves of the sausage are fitted with a wooden piercer. Finally, the sausage is doused with the sauce and sprinkled liberally with curry powder (or vice versa). If desired, cayenne pepper (order: "hot" or "extra hot") or crushed dried chili peppers (order: "with seeds") are added. The addition of Worcester sauce or "hot onions" (chopped raw onions with chili) may be desired. A special ketchup based on tomato paste and spices is often made by the stand and is often added warm over the sausage links.
In the 1960s, the currywurst became known in East Berlin - among others through Konnopke's Imbiß. In GDR times, only curry sausage without casing was offered; bratwursts had already been produced without casing before. The sausage was served uncut in one piece with curry powder and cold thin ketchup (or cold thick tomato sauce). For eating with the fingers, one end of the sausage was left without sauce.
The typical side dish is a small soft roll, which is particularly good for dipping the sauce. In East Berlin it was a normal Schrippe or a slice of untoasted toast. Other typical side dishes are French fries, often with mayonnaise, or fried potatoes.
On 6 March 2020, the "Berlin Currywurst without intestine" was registered by the German Patent and Trademark Office as Geographical Indication 31 2017 001 169.4. This means that this type of "Berliner Currywurst" may only be produced in Berlin. The testing procedure took thirteen years, as many other producers also wanted to produce from outside.
Volkswagen Currywurst
→ Main article: Volkswagen Currywurst
The currywurst from the Volkswagen canteens in Wolfsburg is well known beyond the factory boundaries. The Currybockwurst has been available for consumption since 1973. In 2014, the VW butchery produced 6.3 million pieces. The sausage has around 20 percent fat content and contains neither phosphates nor milk protein. In this sausage, the sausage meat itself is seasoned with curry. This is added to the meat with pepper before it is smoked and cooked. VW curry sausage and VW spiced ketchup are also available in supermarkets in parts of Lower Saxony.