"Bog butter" refers to an ancient waxy substance found buried in peatbogs, particularly in the Great Britain and in Ireland. Likely an old method of making and preserving butter, some tested lumps of bog butter were made of dairy products while others were meat-based.
In Scotland, the practice of burying bog butter dates back to at least the 2nd or 3rd century. Until recently, Ireland's oldest recorded find of bog butter was a carved hanging bowl dating back to the 6th or 7th century AD. On April 29, 2011, there were press reports of a find of approximately 100 pounds (45 kg) of bog butter in Tullamore, County Offaly, thought to date back about five millennia.