I'm not sure about that.  I do know, though, that sometimes other things are added to the cake ingredients, like dried fruit, cocoa, vanilla extract, or fresh fruit.
Yes it is common to add frosting made from vanilla or cocoa. Sometimes fruits and nuts are added as well.
hey i love cake, its so delicious, do you know much about it? Oh do you!  Well for starters, I know it's a sweet dessert form, and it's usually baked. What are cakes made of? Ah, they  have multiple ingredients such as flour, eggs, sugar, butter, a leavening agent like baking powder, and a liquid. what about after is done baking? do you add anything sweet on top of it?
Common additional ingredients and flavourings include dried, candied, or fresh fruit, nuts, cocoa, and extracts such as vanilla, with numerous substitutions for the primary ingredients.