NEVER try a new recipe (for any special event you are having) without doing a trial RUN first. (Did you notice all the pink cooking utensils ... of course you did!)
I prepare tons of food to take to the Antietam Illumination (tomorrow) ... I couldn't find my NORMAL recipe for oatmeal cookies so I got out the old Betty Crocker cookbook ... well, these mixed well, looked good on the baking sheet ... BUT they came out like a lace cookie rather than a soft chewy cookie ... SOOO this double batch of cookies, nearly 100, went to work with DH.