My favorite dessert is chocolate cake. It is cake flavored with melted chocolate or cocoa powder.
I used to have that for every birthday.  I bet chocolate is the most popular cake
It is quite popular. They can also be made with fudge, vanilla creme, and other sweeteners.
Do you happen to know the history of cake?  When was it invented?
In the Middle Ages cakes were modifications of bread and not very sweet. They have become sweeter over time.
I have always liked cheesecake but I am not sure if it is officially a cake, or more of a pie
It could be considered both since it can be baked or unbaked and usually sweetened with sugar.
I think cheesecake is my favorite cake, but I also really enjoy carrot cake