01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, and salt; set aside.
03 - Beat butter, granulated sugar, and brown sugar in a large bowl until light and fluffy, about 3 minutes.
04 - Add eggs one at a time, mixing well after each addition; stir in vanilla extract.
05 - Gradually add dry ingredients to wet mixture until just combined; fold in chocolate chips.
06 - Scoop tablespoon-sized portions of dough onto prepared baking sheets, spacing 2 inches apart.
07 - Bake for 10 to 12 minutes or until edges are golden and centers are set; cool on baking sheets for 5 minutes before transferring to a wire rack to cool completely.
08 - Beat cream cheese and butter together until smooth; add powdered sugar and vanilla extract and beat until creamy; add milk as needed to achieve spreading consistency.
09 - Spread a thin layer of frosting on each completely cooled cookie.
10 - Warm chocolate-hazelnut spread and milk in a microwave-safe bowl for 20 seconds; stir to smooth, then drizzle over frosted cookies with a spoon or piping bag.
11 - Allow drizzle to set for 10 minutes before serving.