Vendor Info In 1982 The Devon Cream Company began making extended life Clotted Cream, using an established but unique vacuum and heat process. Today, they export the unique flavors of Devon dairy products worldwide. Their vacuum and heat process gives Clotted Cream an extended shelf life, preserving the smooth creamy texture until you open the jar. Clotted Cream is the essential ingredient for a traditional high tea with scones and jam.