birthday cake

noun[before a noun]4

1. •
   A cake, often iced and decorated, made to celebrate a person's birthday.

   • We sit around chatting, with plates of birthday cake on our laps that none of us have got the stomach for. — 2015
2. •
   (US) Any of several kinds of cakes commonly made to celebrate birthdays.

   • Pat crushed up a package of birthday cake Oreos and sprinkled them over birthday cake ice cream.
3. •
   (US) A kind of buttery, frosted, vanilla cake.
4. •
   (US) Confetti cake.