Cass-Clay  Cass-Clay or Cass-Clay Creamery is a creamery headquartered in Fargo, North Dakota. It was founded in 1934 in neighboring Moorhead, Minnesota. Its present-day headquarters are at 200 20th St North in Fargo. It manufactures dairy products such as milk, cream, butter, sour cream, cottage cheese, yogurt and ice cream. It also manufactured dips and juices. In 1935 Cass-Clay Cooperative Creamery opened its first plant in Moorhead Minnesota  In 2007 it was acquired by Associated Milk Producers Inc. and in 2012 it was purchased by Kemps LLC