Cocoa powder not only enhances the flavor and appearance of cakes, but also affects the texture and health properties, making it an important ingredient in baking.

1. Flavor enhancement: Cocoa powder provides a rich chocolate flavor to cakes and is a key ingredient in making desserts such as chocolate cakes and brownies.

2. Color adjustment : Cocoa powder gives cakes a dark brown or black color, enhancing the visual effect, especially when making chocolate-themed cakes.

3. Texture effect: Cocoa powder can change the texture of cakes, making them firmer or softer, depending on the recipe and dosage.

4. Health benefits: Cocoa powder is rich in antioxidants, and using it in moderation can add health value to cakes.

5. Diverse applications: Cocoa powder is not only used for cake bodies, but also for decoration, such as sprinkling on the surface or making chocolate sauce, ganache, etc.

6. Matching with other ingredients: Cocoa powder is often paired with sugar, butter, etc. to balance the bitterness and enhance the overall taste.