A richly or elaborately decorated cake which is served at a wedding and is presented to or symbolizes the groom. Opposed to bride's cake.
The groom's cake is typically a fruitcake or chocolate cake, while the bride's cake is typically decorated with white icing. The custom of having separate bride's and groom's cakes is now usually associated with the American South.
Mid 19th century; earliest use found in Evansville (Indiana) Daily Journal. In some forms from the genitive of groom + cake.