In the interest of time, last night I decided to mix, in advance, all the dry ingredients for a devil's food cake. I was supposed to add flour, cocoa, baking soda and salt. But I honestly can't remember if I added the salt! (Got a phone call right in the middle of this task.) What would happen if I baked the cake and there wasn't any salt in it? Or would it be better to add a teaspoon of salt, possibly doubling the amount called for? Any suggestions? Many thanks.