Dose cake flour have baking powder or soda in it?

Here's why:

* Cake flour is a low-protein flour. This means it has a lower gluten content, resulting in a tender, delicate crumb.

* Baking powder and soda are leavening agents. They create air bubbles in the batter, causing it to rise.

* Cake flour is designed to be used in recipes that already include leavening agents. Adding baking powder or soda to cake flour would result in an overly-leavened cake that might be dense and tough.

If a recipe calls for cake flour, you should always use it as directed. You can also make your own cake flour by mixing all-purpose flour with cornstarch (a common method). Just remember to always follow the recipe's instructions for leavening agents.