Make the Signature Chocolate Chip Dough. Use your fingers to make dime-size pieces of dough; the pieces should not be perfectly uniform. Lay the pieces on a baking sheet in a single layer and chill in the freezer while you make the fudge.
Make the fudge: Place the chocolate chips and Marshmallow Fluff in a large bowl and set aside. In a large microwave-safe bowl, combine the sugar, butter, cream, and salt. Heat the mixture in the microwave on 50% power for 2 minutes. Stir well and heat for an additional 30 seconds, or until the mixture comes to a boil. Pour the mixture over the chocolate chips and Fluff. Let sit for 5 minutes.
Use a hand mixer or a stand mixer fitted with the whisk attachment to blend the ingredients on medium speed until smooth and soft. Continue to whisk until the chocolate is smooth. Set the warm fudge mixture aside for and let cool for 30 minutes.
Meanwhile, line a 9”x13” pan using my Picture-Perfect Parchment Paper technique (see page 42).
Once the fudge is cooled, remove the cookie dough from the freezer. Measure 1 cup of chunks and set aside. Fold the remaining cookie dough chunks into the cooled fudge. Do not overmix—the cookie dough should remain in large chunks.
Pour the mixture into the prepared pan and use a rubber spatula to spread into a single layer. Top with the reserved 1 cup cookie dough chunks. Refrigerate on a level surface for 3 to 5 hours, until completely set. Cut into squares to serve.
Store the fudge in an airtight container in the refrigerator for up to 5 days or in the freezer for up to 2 months. To eat frozen fudge, let thaw in the refrigerator for at least 2 hours before serving.