Making cookies is also a matter of practice so you know instinctively that something is wrong. Follow the recipes and work on your learning curve before you substitute.
@Econlady Thank you. I am on the learning curve, like you correctly mentioned.
I really appreciate having guidance and insights from experienced cookeirs, such as Julia, you and other talented cookie artists here.
In case of Julia's recipes, my intention is never to experiment. My intention is only to follow the recipe. My experimentation is only with recipes I come up with on my own, still learning.