Most people just call it a round cake. Other possibilities might be coffee cake, or torte.
There is no special cake for Purim, but there are special cookies (or biscuits), called Hamantaschen, that are triangular and somewhat resembling small pies.
A small, sweet cake would be a cupcake.
A finger cake is a small cake that is usually long or oval in shape (meant to sort-of resemble an index finger of sorts). It is commonly made out of simple cake, like pound cake or white cake. It can be chocolate cake, and it can often be found in a simple type of cake coated with chocolate or nuts.
A piece of cake is simply called (and spelled) "a piece of cake." It may also be called "a serving of cake" or "a slice of cake."
I called the Carvel in Tampa, they said its 27 for the large and 24 for the small.
They are called this because they are made lazily
-cupcake :is the only compound word that I can think of that is a compound word for a small dessert cake.
It is called cake decorating.
Cake toppers
A small cake with fancy frosting is often referred to as a "petit four." These delicate confections are typically bite-sized and can be intricately decorated, making them a popular choice for elegant desserts and special occasions.
A cakelette is a small cake.
fritido