Final answer:
Cake flour is best for making cakes because it has a lower protein content, resulting in a finer texture and softer crumb. The finely ground texture of cake flour also makes it easier to mix and produces a lighter and more tender cake. The slight acidity of cake flour helps activate leavening agents and create a fluffy texture.
Step-by-step explanation:
The reason why cake flour is best for making cakes is because it is made from soft wheat which has a lower protein content compared to other types of flour. This low protein content results in a finer texture and a softer crumb in the cake. The finely ground texture of cake flour also makes it easier to mix, resulting in a cake that is lighter and more tender. Additionally, cake flour is slightly acidic, which helps to activate the leavening agents in the cake and create a fluffy texture.