Do you have to use cake flour in angel food cake?

While you can use cake flour in an angel food cake, it's not necessary and some would argue it even detracts from the cake's signature lightness and airy texture.

Here's why:

* Angel food cake relies on whipped egg whites for its texture. Cake flour, with its lower protein content, is meant to make cakes tender. Using it in angel food cake can result in a denser, less airy texture.

* All-purpose flour has a higher protein content which helps stabilize the whipped egg whites, contributing to the airy texture.

However, there are exceptions and some people do prefer the subtle difference cake flour brings:

* Cake flour can create a slightly finer crumb. This is mostly a visual difference and not a significant change in texture.

* Cake flour can make the cake a bit softer. Some find this desirable, but again, it can slightly impact the airy texture.

The bottom line:

* For a traditional angel food cake, use all-purpose flour for the best results.

* If you prefer a slightly finer crumb and softer texture, you can experiment with cake flour, but be prepared for a less airy outcome.

Ultimately, it comes down to your preference and what you're looking for in your angel food cake!