To dream of a wedding cake represents a special or rare occasion where something is becoming permanent. A powerful sense that something will last for good.
Positively, a wedding cake may reflect how good you feel to know that something negative will never happen again. It may also reflect how good you feel to know that something good will be permanent. Feeling joy or relief in knowing something will last.
Negatively, a wedding cake may represent jealousy or embarrassment that someone else is enjoying a permanent achievement that you can't stop.
*Please See Cakes