A. Self-rising flour is not a magically levitating substance - it just means that the salt and baking powder have already been added in all-purpose proportions. However, since the rise is the highlight of this flour, it is usually made with a lower protein base for a softer result. To make your own, choose soft wheat flour and add 1 1/2 tsp baking soda and 1/4 tsp salt to each cup.