In my quest for the delicious warm croissant with ham, gruyere, and butter -- mustn't forget the butter! -- I have discovered Kerry Gold, a magnificent and sweet Irish butter.
The German expression alles ist in Butter ("Everything is in butter"): everything is in order. It is based on the fact that in the Middle ages, fragile articles were transported using butter as we use thermocol today. For this for example tableware was inserted into warm liquid butter. The butter solidified itself as it cooled down and so protected the fragile goods. At the destination, the butter was again liquefied and poured off.
The English word "butterfly" has its origins in the medieval superstition that witches transform into butterflies in order to steal farmers' cream or butter.