Potted cream is a type of cream that is thick and creamy, similar to clotted cream. Clotted cream is made by heating full-cream cows milk using steam or a water bath and then leaving it in shallow pans to cool slowly. During this time, the cream content rises to the surface and forms "clots" or "clouts". Potted cream is a variation of clotted cream that is flavored with butterscotch and served as a dessert in a mason jar. The recipe for potted cream typically involves mixing together egg yolks, vanilla extract, rum, and butterscotch flavor, and then slowly adding cream. The mixture is then chilled and served in a mason jar.