I want to make cake today but I'm out of cake flour in my kitchen, can I use all-purpose as an alternative?
The primary difference between cake flour and all-purpose (AP) flour is the protein content (which becomes gluten). The protein content of cake flour is about 8%, while the protein content of AP flour is slightly higher.
If your out of cake flour, yes you can substitute the all-purpose flour as an alternative but make sure you have cornstarch too in your kitchen.
Here’s how to convert all-purpose flour (AP) to cake flour (CF).
Get one cup of all-purpose flour, spooned and leveled. Remove two tablespoons, and then add two tablespoons of cornstarch to the all-purpose flour. Mix evenly before using.Written Jun 06, 2019