<<Disclaimer: Verify this information before applying it to your situation.>> Well, I tried using cornstarch as flour in my favorite brownies recipe. It didn't work, for a very intersting reason. It was too light. The brownies developed a wonderful crust which separated from the rest of the batter. It does lead me to believe that cornstarch must be used as a cake flour (as Julia Child said), or at least not be used in brownies. I did find Nick Malgeri's great big new cookbook on baking and I noticed he has many recilpes for cakes & cookies using either cornstarch, cake flour or flourless. I will keep trying my old recipes and let you know the outcome. Ann