Making your own Self rising cornmeal mix

Karen's really good Sweet potato cornbread calls for self-rising cornmeal.  We sent Nathan to the store and he couldn't find self rising white cornmeal so bought white cornmeal and I found a recipe on line to make it self rising.  Here is the recipe:  For each cup of self rising cornmeal:  3/4 C cornmeal, 3 T flour, 1 T baking powder, 1/2 tsp salt.  It was really good and a hit with everyone, even the kids!

Notes on Three Cheese Baked Ziti page 143

Just a note on my recipe.  When I made it last time I added more sauce because you can't find a 28 oz. jar of spaghetti sauce anymore and 26 oz. isn't enough.  I added a small jar of sauce with the large jar and it wasn't too much.  Otherwise, I think it is a little dry.  It will serve 8 if they are not really big eaters or if you serve it with a big salad and dense bread.