I don't know why there has been an explosion YouTube masters trying to break the secret of the Levain Chunky Chocolate Chip Cookie Recipe, but the explosion has been interesting to watch. I had never heard of Levain and their famous cookie until a Cupcake Jemma video popped up on my feed. First Jemma and her gang went to New York City and raved over the Levain cookie. Here is the November 7, 2019, video. Then once back at the Crumbs and Doilies Bakery (C&D) in the UK, Sally & Dane (Jemma was…