Refers to a dish made of a béchamel sauce (a basic French white sauce) combined with mushrooms, pimentos, and green and red peppers. Chopped meat is often added such as chicken or turkey. The resulting dish is then called chicken a la king or turkey a la king.
The tradition of the King's Cake was originally started as a method of choosing a sacred king during the time of pre-Christian religions of Europe. The cake was baked with a nut or a bean inside and whomever got the piece containing the prize was chosen as the Sacred King. The King's Cake tradition was carried down through the generations and is still a huge part of the Carnival Season and Mardi Gras today.