Never made them from a mix. I have made them with a recipe from Brown Eyed Baker. Not sure if she posts here or not but I can attest to the recipe being right on target with the NY bakery B&W cookies. Not sure if this is what you are looking for or not, here is a link to her recipe:
http://www.browneyedbaker.com/2013/04/25/black-and-white-cookies-recipe/#comment-995997
I have made these numerous times for my late mother (originally from Upstate NY) and a good friend from the Bronx. They both agreed that they were exactly the same as what they used to get from the NY deli's. Mom said even better!
Arthur Schwartz's Black and White Cookie Recipe is the best. I tried several others. Scroll down on the link for full recipe.
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