Self-rising flour is flour that has a leavening agent already added. These agents are usually baking powder, salt and baking soda. Self rising flour makes the cookies and other baked goods tall and fluffy instead of flat and dense.
Homemade self-rising flour can be made by adding 1 1/4 teaspoons of baking powder and 1/4 teaspoon of salt to each cup of all-purpose flour. Self rising flour is normally used when baking biscuits, cakes, muffins, pastries and other similar recipes.Learn more about Substitutions