Alton Brown's "the Puffy"

http://www.foodnetwork.com/recipes/alton-brown/the-puffy-recipe/index.html

I was very excited to try this cookie that used cake flour and baking powder instead of soda. I had reservations because it uses butter flavored shortening and I like real butter. I was hoping for a cake like cookie but it ended up thin and chewy. Not a bad result overall but not what I was expecting. I had my usual tasters try them. While they agreed puffy wouldn't be what they would call them they loved them, high marks on texture.

Texture: soft and chewy
Flavor: ok, I miss the butter
Difficulty: pan rotation and parchment paper
Unusual ingredients: cake flour and baking powder

Next attempt: I will try a brand new can of baking powder, maybe that would explain the "non" puffiness. Also, I would ditch the parchment and pan rotation.