Frost (givre) is what makes the world look white when the night has been very cold (not snow). People often make decorations with fake frost to give a winter atmosphere for Christmas.
What would Christmas be without brandy butter? This sweet « sauce » which melts deliciously on hot pudding or mince pies is made with butter, icing sugar and brandy. C’est tellement anglais qu’il n’y a pas de traduction !