A cake is a baked good containing one or more edible substances, created by a baker. Cakes are made in a kitchen, using appliances, implements and utensils. An appliance is a powered mechanical device used to augment the baker's abilities, different from an implement and a utensil. Implements and utensils are unpowered tools used by hand to produce batter from ingredients. A batter is a mixture produced in stages, consisting of a base starch, proteins and flavoring agents.
For a concrete example of a cake, consider a cake containing one or more fruits. The fruit may be uniformly distributed among the cake's contents or clustered in toppings. This produces the cake's characteristic flavor and color, though color may also result from artificial coloring agents.
Through prolongued exposure to heat, we can transform batter into a cake. Molds may be used for this. Any bowls, spoons or whisks used in the process may contain residual batter suitable for direct consumption. [1]
In some ways I've stopped just when things were about to get good, but now you should have a solid understanding of the fundamentals.
[1] Licking is actually quite natural in this context.