Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a large mixing bowl, cream together softened unsalted butter, granulated sugar, and brown sugar until light and fluffy.

Add the eggs one at a time and mix well, then stir in the vanilla extract.

In a separate bowl, whisk together the all-purpose flour, baking soda, and salt, then gradually add to the wet mixture.

Fold in the semi-sweet chocolate chips and chopped walnuts gently.

Drop rounded portions of cookie dough onto the prepared baking sheets, spacing them 2 inches apart.

Bake for 10-12 minutes, until the edges are golden brown and the centers are slightly underbaked.

Let the cookies cool on the baking sheets for about 5 minutes before transferring them to wire racks to cool completely.