PJ, what does the vinegar do? Also, I am so happy to find some good butterscotch chips and will be ordering some along with the butternut flavoring. I think I may sprinkle these with some finely ground kosher salt mixed with some demerara sugar -- my new favorite cookie topping. Vinegar cuts the sweetness just a bit; and reacts with the baking soda to make cookies that are crunchy, not hard. Since you've tried it, I guess you know to be judicious with the coarse salt - a little goes a long way... PJH

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