Is Bisquick the same as self-rising flour?
Self rising flour consists of flour, salt, and baking powder.

Bisquick contains all of these ingredients plus hydrogenated vegetable shortening.

Per Wikipedia


  One cup of Bisquick can be substituted by a mixture of one cup of flour, 1½ teaspoons of baking powder, ½ teaspoon of salt, and 1 tablespoon of oil or melted butter. Optional: to the above mixture add 1/2 cup buttermilk powder.


so while it is fairly easy to convert a recipe from using self rising flour to Bisquick (by also reducing the fat from the recipe), they are not quite a 1:1 substitution.