A chemical change involves the transformation of a compound into a completely new substance. Old bonds are broken, and new bonds are created as the molecules reorganize. The chemical properties of the newly formed product are entirely different from that of the starting substance ^[1-4].

Baking is a process where the ingredients are mixed to form a batter. The batter is then transferred to a mold and placed in an oven to absorb heat. This method is known as endothermic process. After some time, the batter changes color and gives off a pleasant smell, indicating that the cake is ready. The cake is light and fluffy, which shows that gases might have been released. Therefore, a new product is formed from sugar, eggs, flour, butter, and baking powder. The process cannot be reversed, i.e., we cannot get the ingredients back from the cake!

Since the change in color, noticeable odor, and gas formation are signs of chemical change, we can conclude that baking a cake is a chemical change.