Some popular flavors of wedding cake icing are red velvet, chocolate, vanilla, lemon and white chocolate with raspberry. Red velvet is named for its rich ruby-red color, and is very commonly used in wedding because red signifies passion and romance.
Chocolate cake icing is also very popular because of its richness and several options for flavor pairings. Vanilla cake icing is very traditional because of vanilla's use in so many other things. Lemon cake icing is a great option for couples who don't want their cake to be too heavy and rich. White chocolate with raspberry is a popular wedding cake icing flavor because it combines chocolate's rich flavor with the tart fruitiness of the raspberry.