"It is as rare to find modern butter molds as it is to find someone who knows how to use them. Instructions for use of a modern butter mold: 1 - Soak the mold in ice water for 30 minuutes and -if convenient - refrigerate the mold for 30 minutes more. This helps to keep the butter from sticking in the mold. 2 - Rinse the mold with cold water and fill it with softened butter. 3 - Smooth the surface with a spatula and cover with plastic wrap. 4- Chill for 2 hours or more.
5 - To unmold the butter, run the tip of a knife around the outside edge to loosen it.Cleaning wooden molds: Use hot water, mild soap, and a brush to loosen residue - but do not soak the mold in water."