Kuuma koira is a traditional street food originating from the city of Nokia. It consists of sausages that are placed into split sugary doughnuts. These hot dogs are typically wrapped in greasy paper and topped with homemade mustard. Kuuma koira was invented by Teodor Leppänen in the 1960s, who used apple jelly doughnuts, but nowadays people use regular sugar-dusted doughnuts, along with pickle relish and raw onions.