I make beer bread (self-rising flour, sugar, and beer). I had, until recently, purchased self-rising flour. Then, I was making it for company and i realized I didn't have enough S-R Flour. My son was napping so I couldn't go out to get more. I hopped on the internet and found the bkg powder and salt amts to add to AP Flour.........the results were exactly the same. I've also used this combo for another recipe, though I'm blanking on which one.........a cake I believe.
Well, at least I know I can add the bkg powder to the cake flour to get "self-rising" cake flour. I keep all my dry ingredients in large plastic containers. It's great to know about the substitions for self-rising flour...b/c then I only have to keep bread flour, cake flour and AP flour on hand.
"No one can make you feel inferior without your consent."-Eleanor Roosevelt