In a small bowl, combine flour, baking soda, and salt. Set aside.
In a large bowl using an electric mixer and the paddle attachment, cream together butter and sugars on medium speed, until light and creamy. Add egg and vanilla extract; mix until combined.
Slowly add flour mixture to wet ingredients; mix just until combined. Do not over-mix.
Gently fold in chocolate chips and walnuts.
Cover bowl and refrigerate dough for 60 minutes. This is optional.
Preheat oven to 375F degrees.
Scoop dough into rounded tablespoons onto an ungreased baking sheet, or silicone mat/parchment paper lined baking sheet.
Bake 7-10 minutes or until they're brown and crispy around the edges and raw in the middle.
Cool cookies on baking sheet on wire rack for 3 minutes; transfer to a wire rack to cool completely. Eat & Enjoy!
Notes
Crisp Chocolate Chip Cookies should be stored in an airtight container and will keep 5 days.