Cake is a baked dessert that is traditionally made out of flour, sugar, eggs and butter or oil. Even though the majority of cakes sold in shops and bakeries are not vegan (unless they are accidentally vegan), it is not difficult to make one at home.
Vegan restaurants also usually have several types of cakes on their menu.
Very simple vegan cake can be made out of flour, sugar, oil and backing powder. More complicated ones use all kinds of extra ingredients, such as cocoa, vanilla, spices, seeds, nuts, berries, tofu, etc.