You probably know how important food is in Christian tradition, but it may surprise you that the practice of hiding lucky tokens in classic holiday dishes has been popular for centuries. A coin, dried bean, toy or even a hard-cooked egg can be a symbol of good fortune for the diner who's served the lucky slice.
Portuguese sweet bread, Louisiana king cake, or the French variation, Gateau de Rois, are a few examples of foods containing treats that once had religious significance. The treat doesn't have to be inside a cake or bread, either. In Great Britain, it's traditional to bake a coin into a Christmas favorite, plum pudding.