Gotland's kroppkakor are made mainly from boiled potato and come out pale, while neighbouring Öland's use raw grated potato and turn grey — a difference islanders take seriously.
A dough made mainly from boiled potato is wrapped around a filling of diced pork belly and onion, then simmered until the dumpling turns firm. It's served split open with melted butter, cream, or lingonberries at island markets and farm stalls.