200 cookies iced and drying...finally!!! Thank you for the input. I was pulling my hair out and going way overboard trying to figure it out! In the past I had one batch of RI not set. I've mostly used one mixer for all. I've been careful about cleaning after I heard tiny traces of contaminants would ruin RI. The uber overkill cleaning started after the RI started not setting up not knowing I had ordered RI mix instead of MP. I about drove myself nuts trying to figure it out.
I like MP for the ease. I dislike eggs and wasting the volume of yolk I would throw away is the main reason I use MP. If I could make cookies with yolk only, I'd try the egg white way. I just can't bring myself to waste that much of the egg.
I'm off for that stiff drink while these cookies dry. Long day of drawing tomorrow. Since I lost an entire day and they are for local Airmen, I'm drawing and dusting with powdered sugar.