While it is well known that Pentecost is often referred to as the birthday of the Church. So the idea of a Pentecost Cake seems like a natural idea.
♫Happy Birthday Catholic Church, Happy Birthday to you♫
Online you can find pictures of attempts of a Pentecost Cake.
But I couldn’t find what I think would be the obvious example of the ultimate example of a Pentecost Cake.
Really there should be wax candles in the shape of the Apostles and disciples that you can light up on a Pentecost Cake.