How much all purpose flour do you need to use for 1 13 cups cake flour?

You can substitute all-purpose flour for cake flour, but you'll need to adjust the amount because cake flour has a lower protein content than all-purpose flour.

Here's how to calculate the amount:

For 1 1/3 cups of cake flour:

* Subtract 2 tablespoons from the amount of cake flour you need: 1 1/3 cups - 2 tablespoons = 1 1/6 cups of all-purpose flour.

Explanation:

* Cake flour's lower protein content: Cake flour has a lower protein content than all-purpose flour, which results in a lighter and more tender texture.

* Substituting with all-purpose flour: When substituting, you need to decrease the amount of all-purpose flour to compensate for the higher protein content.

* The 2 tablespoons: This is a general rule of thumb to account for the difference in protein content between the two flours.

Important: This is just an approximation. For best results, you may need to adjust the amount of all-purpose flour based on the specific recipe and your desired texture.