Levain Bakery in New York City is known for making the best chocolate chip walnut cookies. The cookies are served warm and fresh out of the oven. The 6 oz treats melt in your mouth, and cause lots of happy sighs and eye-rolling. I decided I was over waiting in line to get my hands on a cookie so I searched for a good copy-cat recipe, made some tweaks, and came up with a cookie that I personally like even better!