Here’s a simple trick: Imagine all-purpose flour is a blank canvas. You have to paint it with your own salt and leavening. Self-rising flour is a paint-by-numbers kit. It already has everything you need for specific projects.
Self Rising Flour Vs Plain Flour - napsahaland
If you find yourself stuck with only one type, you can make your own substitution. For every cup of all-purpose flour, add 1½ teaspoons of baking powder and ¼ teaspoon of salt. Stir it well. Boom—you just invented self-rising flour. Or, if you only have self-rising and need all-purpose, just reduce or skip the added salt and baking powder in your recipe. It’s like a little algebra for your pantry.
Label your bags with a permanent marker. I know it sounds silly, but when you’re tired after a long day and your kid is asking for cookies, you don’t want to play detective with flour. Write “AP” or “SR” on the bag. Future you will thank you.