There are two types of slátur; blóðmör (Icelandic) or "blood pudding" and lifrarpylsa ("liver sausage").
The pouches are sewn shut after filling, then they are slow boiled for 2–3 hours.
Offal is food of the autumn, prepared at the traditional slaughter time.
Prepared and cooked offal, both blood and liver pudding, is available in stores all year round but many people consider it largely as þorramatur, at the festival of Þorrablót, celebrated in January and February each year.
Slátur is presented alongside other savoury and sour dishes at this time of year, including hákarl.