So, why would you want to convert all-purpose flour to self-rising flour in the first place? Well, sometimes you just don't have self-rising flour on hand, or maybe you want to make a recipe that calls for all-purpose flour but you only have self-rising. It's like being a flour MacGyver, using what you have to make something amazing.
And the best part is, it's really not that hard to convert all-purpose flour to self-rising flour. You just need to know the right ratio of flour to baking powder to salt, and you're good to go. It's like a little math problem, but don't worry, it's easy peasy.
The general rule of thumb is to use 1 1/2 teaspoons of baking powder and 1/4 teaspoon of salt for every 1 cup of all-purpose flour. That's it! Just mix it all together, and you've got yourself some self-rising flour. It's like magic, but without the wand or the top hat.
Easy Beer Bread Recipe, No Added Yeast - ~Texas Homesteader~