The Precise Rules for Real Frankfurt Sausages
You have been eating frankfurters wrong your entire life. To keep the skin from bursting, these thin sausages should never be boiled, but merely soaked in hot water for eight minutes.
Authentic Frankfurter Würstchen are a protected regional product made using sheep intestine casings. Because they are delicate, they are smoke-cured at low temperatures rather than cooked through. If you grill them or boil them too long, the casing splits and ruins the texture. They are meant to be enjoyed simply with mustard, horseradish, or potato salad.
Source: Frankfurter Würstchen