I have made an amazing discovery. Do you see the cookies above? Do you see they are not flat as pancakes? do you see they are fluffy?
I live at 8,600 feet and have had some small success baking. I've been working on a chocolate chip cookie recipe since I moved here in 1993. Sometimes they have been OK, sometimes they have spread and been awful. I've tweaked the recipe above until they were acceptable, but not like this.
About a week ago my husband was listening to Science Friday on NPR, and a man was being interviewed about cooking science. He said something that is probably obvious to everyone else out there, but just in case I needed to share. If you are using a leavening in your baking, and there is no acid in the recipe, you should be using baking POWDER. Every cookie recipe I look at calls for baking SODA, as did the one above. As soon as I looked at the recipe and realized there was no acid, and that baking powder supplies its own acid, I decided to give it a try, et voila! No more flat cookies. I am amazed!
Thank you for listening :^)