Looking for the one cookie recipe that everyone will ask for this Christmas? These festive “bake-your-list-and-make-them-twice” treats pack in all the holiday magic—melty chocolate chips, red & green M&Ms, caramel or butterscotch chips, crunchy pretzels, and even ruffled potato chips for that irresistible sweet-and-salty bite. The secret to their chewy texture and bold flavor starts…