Kerstbrood is a traditional Dutch Christmas bread filled with raisins, currants and often almond paste, sliced and served through the December holidays. Adding pindakaas, peanut butter, is not the classic serving, which is why the phrase works online as a small, very Dutch food joke. Short clips naming an unexpected combination in a flat, confident way travel well on soundboards and in group chats, where they can be dropped without context. The clip stays useful each holiday season and whenever peanut butter on anything becomes the topic.