There really isn't anything mysterious about self raising flour, just three simple ingredients, but it can be annoying for people who rely on it to realise they don't have any in the pantry.
Author: FinSki's
Recipe type: Hints and tips
Cuisine: English
Ingredients
1 cup plain flour
1½ tsp baking powder
½ tsp salt
Method
Simply mix all three ingredients together and there you have it... self raising flour
Notes
If you were needing a large quantity, rather than measure out the ingredients it’s better to weigh them. Weigh 1 cup of flour and take note of it. Weigh 1½ tsp of the baking powder, again taking note of it and then weigh the salt. Double, triple etc the weighed quantities as needed.
Recipe by Finding Feasts at https://www.findingfeasts.com.au/recipe-index/make-self-raising-flour-home/