I thought I read that you add cornstarch to frosting to stabilize for humidity. I actually added 1 1/2 tsp to the powdered sugar and gave it a whirl. Then I read online that you are suppose to cook it first? Why, is the cornstarch in the 10X cooked? Is there a problem adding that much to 6 cups sugar and 1 1/3 cups cocoa powder? if you do have to cook it first? won't that be difficult to incorporate into a finished frosting? Thanks