Homemade for Heroes posted: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.
But you can use pasteurized whites or albumen powder (pure dehydrated whites) and waste nothing, while also guarding against salmonella and always knowing what you're getting. Both are super easy, and cheaper than MP, too! Best of luck!